{"title":"T-shirt Pixelated Physics | La fisica da indossare","description":"\u003cp\u003eOgni T-shirt Pixelated Physics personifica in pixel art un fenomeno reale della fisica, dall'entropia e lo zero assoluto all'effetto tunnel quantistico, all'energia oscura e al principio di esclusione di Pauli. Ogni pagina prodotto riporta l'equazione dietro il design e una spiegazione breve e con fonti. T-shirt di fisica unisex in nero e bianco, taglie S–5XL.\u003c\/p\u003e","products":[{"product_id":"zeno-the-observer-graphic-tee-unisex-heavy-cotton-shirt-for-sci-fi-fans","title":"Zeno – Quantum Zeno Effect \/ The Observer Physics T-Shirt","description":"\u003cp\u003eStare at a pot and it never boils. Quantum mechanics has its own version. Zeno embodies the quantum Zeno effect: measure a quantum system often enough and its evolution is suppressed. Zeno wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41354162077799,"sku":"30483864169501122924","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41354162110567,"sku":"33717755531248384009","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41354162143335,"sku":"32760832182194309172","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41354162176103,"sku":"10175366032990709967","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41354162208871,"sku":"98609020172922956313","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41354162241639,"sku":"68606888372903248457","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41354162274407,"sku":"24251520938156573206","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41354162307175,"sku":"24673329858297733260","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41354162339943,"sku":"62241949204526052724","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41354162372711,"sku":"30666621975623794928","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41354162405479,"sku":"36594920821328754332","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41354162438247,"sku":"18627938026705177210","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41354162471015,"sku":"24748792686373265671","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41354162503783,"sku":"31137393044215342294","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41354162536551,"sku":"15379302682652759051","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41354162569319,"sku":"89808638438274502553","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/zeno_front_17_white.png?v=1793581825"},{"product_id":"schrody-quantum-superposition-tee-unisex-heavy-cotton-shirt-for-sci-fi-fans","title":"Schrödy – Schrödinger’s Cat \/ Quantum Superposition Physics T-Shirt","description":"\u003cp\u003eBox, cat, vial, sealed lid. Physics’ most famous pet is still arguing with us. Schrödy is Schrödinger’s cat: his 1935 thought experiment questioning quantum superposition at everyday scale. Schrödy wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"Black \/ S","offer_id":41354217259111,"sku":"33913541253924843374","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41354217324647,"sku":"35330119983873285587","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41354217390183,"sku":"32692313472889492366","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41354217455719,"sku":"15970373871798709772","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41354217521255,"sku":"91532086942190699694","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41354217586791,"sku":"11885708955992675151","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41354217652327,"sku":"30013987764120202468","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41354217717863,"sku":"49530744793234371638","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/schrody-quantum-superposition-tee-unisex-heavy-cotton-shirt-for-sci-fi-fans_front_01_black.png?v=1793609949"},{"product_id":"i-twist-space-itself-spacetime-distortion-pixel-tee","title":"I Twist Space Itself – Spacetime Distortion Physics T-Shirt","description":"\u003cp\u003eSpace is not a rigid stage. Put enough mass on it and the stage bends. Mass curves spacetime and light follows the curve: gravitational lensing, from general relativity. I Twist Space Itself wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41355653775463,"sku":"29594054138007890354","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41355653808231,"sku":"10649654809128518791","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41355653840999,"sku":"53764472397542197407","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41355653873767,"sku":"11231559499332373513","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41355653906535,"sku":"24928426792329629736","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41355653939303,"sku":"23246975420624467280","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41355653972071,"sku":"30450904323308212033","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41355654004839,"sku":"18608583972407669545","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41355654037607,"sku":"33449678386942212244","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41355654070375,"sku":"22550970386628233310","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41355654103143,"sku":"14869176812979102110","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41355654135911,"sku":"23574665762363256015","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41355654168679,"sku":"69158246923385133620","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41355654201447,"sku":"30945574635531384119","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41355654234215,"sku":"17617609174519557037","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41355654266983,"sku":"10010513792651168594","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/white-i-twist-space-itself-physics-t-shirt-pixel-art-gravitational-lensing-front.jpg?v=1791042302"},{"product_id":"graviton-whisper-pixel-tee","title":"Graviton Whisper – Quantum Gravity \/ Force Carrier Physics T-Shirt","description":"\u003cp\u003eMeet Graviton Whisper. Gravitational waves are real. Their quanta may be too. LIGO caught spacetime ripples from merging black holes in 2015. If gravity is quantum, those waves come as gravitons: massless, spin 2, energy hf; observations already cap any graviton mass at 1.27×10⁻²³ eV\/c². None has ever been detected, and catching a single one may be beyond any practical detector. Graviton Whisper on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356714934375,"sku":"20210528050732828351","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356714967143,"sku":"17992670653028777826","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356714999911,"sku":"31628192403506177794","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356715032679,"sku":"32866181306661261960","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356715065447,"sku":"18808828025665725984","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356715098215,"sku":"10255490354778232400","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356715130983,"sku":"30959685281917323928","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356715163751,"sku":"15105437462199040852","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356715196519,"sku":"21741836332488402578","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356715229287,"sku":"21263357694668139916","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356715262055,"sku":"33667970564654877608","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356715294823,"sku":"15495253478587342970","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356715327591,"sku":"26292232849257710093","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356715360359,"sku":"17240795510902146332","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356715393127,"sku":"52763819109883170813","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356715425895,"sku":"82355747487475294343","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/graviton-whisper_front_01_white.png?v=1793581846"},{"product_id":"null-beacon-causal-disconnect-pixel-tee","title":"Null Beacon – Cosmic Event Horizon \/ Causal Disconnect Physics T-Shirt","description":"\u003cp\u003eMeet Null Beacon. Some galaxies we can see will never hear from us. In an accelerating universe there is a distance beyond which light sent today never arrives: the cosmological event horizon. Today it lies about 16.7 billion light-years away, and galaxies we now see at redshift about 1.9 are at that distance. We still see their old light, but anything they emit today is lost to us. Null Beacon on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"Black \/ S","offer_id":41356716671079,"sku":"17848742329374345548","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356716703847,"sku":"30603210385337472388","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356716736615,"sku":"39392371116640986905","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356716769383,"sku":"33588223963442353884","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356716802151,"sku":"15499400716225569322","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356716834919,"sku":"12112419227586207602","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356716867687,"sku":"57797645554377871469","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356716900455,"sku":"18471868316770909567","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/null-beacon_front_02_black.png?v=1793581864"},{"product_id":"neutrina-fade-neutrino-ghost-matter-pixel-tee","title":"Neutrina Fade – Neutrino Ghost Matter Physics T-Shirt","description":"\u003cp\u003eRight now, tens of billions are passing through your thumbnail. About 65 billion solar neutrinos cross each square centimetre every second. Pauli proposed them in 1930; Cowan and Reines caught one in 1956. Neutrinos change flavour as they travel, which is only possible if they have mass. We see them through the Cherenkov light of the electrons and muons they knock loose. Neutrina Fade on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"Black \/ S","offer_id":41356716998759,"sku":"27506410100763850716","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356717031527,"sku":"80306883581374771894","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356717064295,"sku":"11126482630344188533","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356717097063,"sku":"26006452582040737239","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356717129831,"sku":"11697000153673887687","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356717162599,"sku":"30154084660274517613","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356717195367,"sku":"20480093914313200266","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356717228135,"sku":"82367179867552275122","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/neutrina-fade_front_17_black.png?v=1793581881"},{"product_id":"eventide-prophet-phenomenon-information-loss-at-the-event-horizon-pixel-tee","title":"Eventide Prophet – Black Hole Information Paradox Physics T-Shirt","description":"\u003cp\u003eWhen a black hole evaporates, where does everything that fell in go? Hawking showed in 1974 that black holes radiate, and in 1976 argued that the information inside is lost, which quantum mechanics forbids. Page sharpened the puzzle in 1993. Recent work points toward information escaping, but the question is still open. Eventide Prophet on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356718637159,"sku":"30031018326189066737","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356718669927,"sku":"83977846385317856265","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356718702695,"sku":"90121006271923962010","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356718735463,"sku":"87143347478016814449","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356718768231,"sku":"12232135060268575372","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356718800999,"sku":"31525612076191397394","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356718833767,"sku":"20870040142305844403","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356718866535,"sku":"23432549818254542270","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356718899303,"sku":"17806087138590319853","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356718932071,"sku":"21833004563178243946","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356718964839,"sku":"18160713406490539111","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356718997607,"sku":"16346651230456033736","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356719030375,"sku":"27064508077121019163","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356719063143,"sku":"32863646941117824842","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356719095911,"sku":"33343135679402928085","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356719128679,"sku":"70106932899433330497","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/eventide-prophet_front_02_white.png?v=1793581900"},{"product_id":"the-silence-beyond-cosmic-horizon-observable-limit-pixel-tee","title":"The Silence Beyond – Cosmic Horizon \/ Observable Limit Physics T-Shirt","description":"\u003cp\u003eThe edge of sight is farther away than the universe is old, in light-years. The universe is 13.8 billion years old, yet the particle horizon, the edge of the observable universe, lies about 46 billion light-years away, because space kept expanding while the light travelled. The Silence Beyond on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356721979495,"sku":"18308684196111112213","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356722012263,"sku":"30505212713917192003","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356722045031,"sku":"28245449746256278371","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356722077799,"sku":"20759717931152296548","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356722110567,"sku":"13081263623459815536","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356722143335,"sku":"32420762678650340122","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356722176103,"sku":"74567210620515055918","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356722208871,"sku":"21643057905795931291","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356722241639,"sku":"12766510296277105659","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356722274407,"sku":"14922554890760475859","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356722307175,"sku":"24690814377078176537","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356722339943,"sku":"30459805703287338163","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356722372711,"sku":"33026546853016222865","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356722405479,"sku":"26197932573046996523","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356722438247,"sku":"89189082775414794116","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356722471015,"sku":"13664193228305828874","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/the-silence-beyond_front_01_white.png?v=1793590409"},{"product_id":"dark-matter-host-gravitational-lensing-invisible-mass-pixel-tee","title":"Dark Matter Host – Gravitational Lensing \/ Invisible Mass Physics T-Shirt","description":"\u003cp\u003eMeet Dark Matter Host. Most of the mass holding galaxies together has never been seen. Dark matter gives off no light we can detect, yet its gravity shapes galaxies and bends light. In the Bullet Cluster, two colliding galaxy clusters, the hot gas slammed together and stalled, but lensing shows most of the mass sailed on with the galaxies: mass where the gas isn't. About five-sixths of all matter is something never directly detected. Dark Matter Host wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356732465255,"sku":"28497807514721892773","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356732498023,"sku":"27744079216624561788","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356732530791,"sku":"20427330499032841502","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356732563559,"sku":"48508010394450599977","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356732596327,"sku":"28049929805971126669","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356732629095,"sku":"17107657608101216544","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356732661863,"sku":"22238989747672118488","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356732694631,"sku":"18328063519193555963","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356732727399,"sku":"57079456109227303815","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356732760167,"sku":"14159939804698526066","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356732792935,"sku":"28488295506790013056","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356732825703,"sku":"40460183046634308789","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356732858471,"sku":"12477206329709871081","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356732891239,"sku":"33106005578042678013","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356732924007,"sku":"22824657396669928213","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356732956775,"sku":"59239027839349872647","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/dark-matter-host_front_17_white.png?v=1793581919"},{"product_id":"void-whisperer-dark-energy-expansion-pixel-tee","title":"Void Whisperer – Dark Energy Expansion Physics T-Shirt","description":"\u003cp\u003eMeet the Void Whisperer, keeper of the cosmological constant Λ, the energy of empty space itself. Since 1998 we have known that the expansion of the universe is speeding up. The simplest explanation is Einstein's Λ: a constant energy density of the vacuum with equation of state w = −1, making up about 68.5% of the universe today (Planck 2018). Its density is tiny, ρ_Λ ≈ 6×10⁻²⁷ kg\/m³, while a naive quantum estimate of vacuum energy comes out up to ~10¹²⁰ times too big. Why Λ is so small is unsolved: the cosmological constant problem. The Void Whisperer on a pixel-art unisex tee; equations, symbols and sources in the physics panel below.\u003c\/p\u003e\u003cp\u003e\"Empty space is never empty. Every new metre of it brings me along.\"\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356742492263,"sku":"30860920571988314889","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356742525031,"sku":"19880230594413532968","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356742557799,"sku":"32058058254374478203","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356742590567,"sku":"24888865712352669946","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356742623335,"sku":"73345298238490786590","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356742656103,"sku":"51245124720818906640","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356742688871,"sku":"26947094815265491405","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356742721639,"sku":"16591253213845642460","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356742754407,"sku":"33967573167962885775","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356742787175,"sku":"17912730607065286217","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356742819943,"sku":"33212833442568180884","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356742852711,"sku":"24673398639766418768","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356742885479,"sku":"19597820624882013243","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356742918247,"sku":"31278091600421451011","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356742951015,"sku":"19240546427615461353","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356742983783,"sku":"29144243612094546088","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/cosmological-constant_front_01_white.png?v=1793581755"},{"product_id":"stellar-core-nuclear-fusion-pixel-tee","title":"Stellar Core – Nuclear Fusion Physics T-Shirt","description":"\u003cp\u003eThe Sun doesn’t burn. It fuses, and loses weight doing it. In the core, at about 15.7 million kelvin, four protons become one helium-4 nucleus, releasing 26.73 MeV, counting the annihilation of the two positrons it makes. The Sun turns about 4.3 million tonnes of mass into energy every second. Hans Bethe worked out the reactions in 1939. Stellar Core on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356812976231,"sku":"30833250293538418628","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356813008999,"sku":"16637769254301720242","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356813041767,"sku":"25551765156084728975","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356813074535,"sku":"12734126170524863968","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356813107303,"sku":"18618869104907980127","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356813140071,"sku":"14685804929908789613","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356813172839,"sku":"62133978528940025711","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356813205607,"sku":"33792457297931284687","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356813238375,"sku":"36869534257102964089","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356813271143,"sku":"79336231342211578744","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356813303911,"sku":"50424043779514216021","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356813336679,"sku":"31131245786605414994","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356813369447,"sku":"10864645811880290603","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356813402215,"sku":"69492616218211864844","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356813434983,"sku":"17670269327524422986","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356813467751,"sku":"29326673000087637150","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/stellar-core_front_16_white.png?v=1793590390"},{"product_id":"plasma-drift-ionized-gas-fourth-state-of-matter-pixel-tee","title":"Plasma Drift – Ionized Gas \/ Plasma Physics T-Shirt","description":"\u003cp\u003eHeat a gas far enough and its atoms come apart. Plasma is ionized gas: free electrons and ions, found in stars, lightning and neon signs. Meet Plasma Drift, named for the E × B drift: in crossed electric and magnetic fields, electrons and ions circle in opposite directions yet drift together, the same way at the same speed, v = E\/B. Plasma Drift wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356814975079,"sku":"17239099701394994897","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356815007847,"sku":"31198954124695618362","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356815040615,"sku":"37220682127262197500","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356815073383,"sku":"32608438535663794486","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356815106151,"sku":"21256344597380241869","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356815138919,"sku":"68026494583715828106","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356815171687,"sku":"33710064788244939067","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356815204455,"sku":"21578327887141914771","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356815237223,"sku":"19810753502667604461","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356815269991,"sku":"16941027565114006919","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356815302759,"sku":"33116834424772523860","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356815335527,"sku":"15682985160432776906","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356815368295,"sku":"14187122868464612497","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356815401063,"sku":"21157902764637118574","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356815433831,"sku":"33314361663254583848","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356815466599,"sku":"86431481725609286731","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/plasma-drift_front_01_white.png?v=1793581939"},{"product_id":"thermal-mirage-heat-refraction-optical-distortion-pixel-tee","title":"Thermal Mirage – Heat Refraction \/ Optical Distortion Physics T-Shirt","description":"\u003cp\u003eMeet Thermal Mirage. That shimmering puddle on a hot road is not water. It is sky. Hot air over a road has a lower refractive index, so skylight bends upward into your eye and looks like water. This is an inferior mirage, and it only works for rays within about half a degree of the road. Thermal Mirage wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356818874471,"sku":"44617540743578908717","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356818907239,"sku":"90264759920778199413","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356818940007,"sku":"95169273065379835799","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356818972775,"sku":"29410085035886140034","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356819005543,"sku":"23584562785368708561","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356819038311,"sku":"14762641342152948903","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356819071079,"sku":"33542981617636280741","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356819103847,"sku":"28547611689110414469","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356819136615,"sku":"23128919494575263578","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356819169383,"sku":"25138827039260759281","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356819202151,"sku":"85418108488160129729","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356819234919,"sku":"12861854585407357681","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356819267687,"sku":"15015762567199042335","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356819300455,"sku":"46746666905054444471","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356819333223,"sku":"30326675626887439769","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356819365991,"sku":"39231747831600577779","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/thermal-mirage_front_16_white.png?v=1793581958"},{"product_id":"superfluid-quantum-fluid-at-near-absolute-zero-pixel-tee","title":"Superfluid – Quantum Fluid at Near Absolute Zero Physics T-Shirt","description":"\u003cp\u003eCool helium enough and part of it stops feeling friction. Below 2.17 K, liquid helium-4 becomes helium II, which pours through gaps no normal liquid can pass. In 1938 Kapitsa, and Allen and Misener, reported it; Tisza and Landau explained it as two fluids, one with zero viscosity. Its rotation comes only in quantized vortices. Superfluid on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41356875628647,"sku":"65284129784003113628","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41356875661415,"sku":"24735692605015635961","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41356875694183,"sku":"20423610712695481482","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41356875726951,"sku":"10338945471345140990","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41356875759719,"sku":"26172867406990563265","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41356875792487,"sku":"28970377835456167502","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41356875825255,"sku":"25334743147810276525","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41356875858023,"sku":"17437876613402902337","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41356875890791,"sku":"65311089964338368052","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41356875923559,"sku":"32936094826617086445","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41356875956327,"sku":"83461682668259463738","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41356875989095,"sku":"11395735009706769492","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41356876021863,"sku":"12478470836796507354","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41356876054631,"sku":"33129282827405189355","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41356876087399,"sku":"40294305211721399904","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41356876120167,"sku":"24435481117707980713","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/superfluid_front_01_white.png?v=1793581976"},{"product_id":"cryo-fault-cryogenic-fracture-pixel-tee","title":"Cryo Fault – Ductile-to-Brittle Transition Physics T-Shirt","description":"\u003cp\u003eMeet Cryo Fault. Some steels bend when warm but snap in hard cold: below a transition temperature their crystals crack before they can flow, the ductile-to-brittle transition. Some wartime Liberty ships broke this way; metals like aluminium stay tough in the cold. Cryo Fault wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41358105411687,"sku":"20757223519096227954","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41358105444455,"sku":"22108618992092443882","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41358105477223,"sku":"31795620351839519495","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41358105509991,"sku":"22225451629895837931","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41358105542759,"sku":"18731596304687733506","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41358105575527,"sku":"31895052349196362176","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41358105608295,"sku":"21069427339169253215","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41358105641063,"sku":"11741413861537655611","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41358105673831,"sku":"88345732934544317112","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41358105706599,"sku":"16733089875141279883","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41358105739367,"sku":"32604569798559057014","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41358105772135,"sku":"96745916731742856025","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41358105804903,"sku":"23274364148072004004","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41358105837671,"sku":"33490397941985623562","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41358105870439,"sku":"61410031431095564750","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41358105903207,"sku":"32855842910539514529","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/cryo-fault_front_02_white.png?v=1793581995"},{"product_id":"spaghetta-black-hole-physics-spaghettification-stretch-pixel-tee","title":"Spaghetta – Black Hole Physics \/ Spaghettification Stretch Physics T-Shirt","description":"\u003cp\u003eA black hole doesn’t just pull you in. It pulls your feet harder than your head. Tidal stretch grows as one over distance cubed. At the horizon of a 10-solar-mass black hole it is about twenty million times Earth’s gravity; at the Milky Way’s four-million-solar-mass black hole it is far gentler, and you would cross unharmed. Spaghetta on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41360776233063,"sku":"28543014023524953734","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41360776265831,"sku":"65263330975332214468","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41360776298599,"sku":"12782277522700541534","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41360776331367,"sku":"14236634348693939474","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41360776364135,"sku":"31828827374162638167","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41360776396903,"sku":"17445635592223899451","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41360776429671,"sku":"21721150501050221449","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41360776462439,"sku":"27477869263840899301","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41360776495207,"sku":"40270137601208379401","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41360776527975,"sku":"25993918717214732382","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41360776560743,"sku":"19092263021815577190","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41360776593511,"sku":"68365021298977840935","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41360776626279,"sku":"50672040927271763643","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41360776659047,"sku":"28957166686157790190","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41360776691815,"sku":"90737864125976074680","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41360776724583,"sku":"20698036355052821723","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/spaghetta_front_17_white.png?v=1793582014"},{"product_id":"quarkbinders-strong-nuclear-force-tri-color-spin-lock-pixel-tee","title":"Quarkbinders – Quantum Chromodynamics \/ Strong Nuclear Force Physics T-Shirt","description":"\u003cp\u003eQuarks come in threes, and never alone. Quarks carry a three-valued charge called colour, proposed in 1964–65 to save the Pauli principle. In 1973 Gross, Wilczek and Politzer found the strong force weakens at short distances, asymptotic freedom; at long range it confines quarks inside hadrons. Quarkbinders on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41360781869159,"sku":"33362998744092744705","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41360781901927,"sku":"32491486367152109677","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41360781934695,"sku":"11655605967067508849","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41360781967463,"sku":"48576544949997090386","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41360782000231,"sku":"23909219740789654630","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41360782032999,"sku":"13225503495103628442","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41360782065767,"sku":"98511229308067762718","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41360782098535,"sku":"31428032201523425888","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41360782131303,"sku":"24288038800810612143","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41360782164071,"sku":"33182721082319885080","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41360782196839,"sku":"25753670813207642787","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41360782229607,"sku":"49030926940363890448","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41360782262375,"sku":"12954821410466345995","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41360782295143,"sku":"24806792814579149653","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41360782327911,"sku":"36124576620444785650","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41360782360679,"sku":"26081100362673506858","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/quarkbinders-strong-nuclear-force-tri-color-spin-lock-pixel-tee_front_16_white.png?v=1793590327"},{"product_id":"hadron-brawler-strong-nuclear-force-smash-stability-pixel-tee","title":"Hadron Brawler – Strong Nuclear Force \/ Quantum Chromodynamics Physics T-Shirt","description":"\u003cp\u003eTry to pull a quark loose and the universe refuses. Quantum chromodynamics: gluons bind quarks so tightly they are never seen alone, only inside hadrons like protons. Hadron Brawler wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41360786784359,"sku":"82142234437235978302","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41360786817127,"sku":"30138171466298079478","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41360786849895,"sku":"19393123477834114521","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41360786882663,"sku":"15368961425709244545","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41360786915431,"sku":"13993031864573238283","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41360786948199,"sku":"13326740055726754488","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41360786980967,"sku":"13635213121873534270","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41360787013735,"sku":"26729640548254894017","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41360787046503,"sku":"15471255085647243137","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41360787079271,"sku":"18317544965642061348","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41360787112039,"sku":"95338475899345394893","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41360787144807,"sku":"10071918975125808052","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41360787177575,"sku":"25016098242384426926","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41360787210343,"sku":"31986651048955953851","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41360787243111,"sku":"75782303451469886714","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41360787275879,"sku":"10066841687661418325","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/hadron-brawler-strong-nuclear-force-smash-stability-pixel-tee_front_16_white.png?v=1793590370"},{"product_id":"corekeeper-strong-nuclear-force-fusion-bond-pixel-tee","title":"Corekeeper – Strong Nuclear Force \/ Nuclear Binding Physics T-Shirt","description":"\u003cp\u003eEvery nucleus heavier than hydrogen packs protons that repel each other, yet it holds together. The strong force binds protons and neutrons in every nucleus, overcoming proton repulsion at femtometre range. Corekeeper wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41360802480231,"sku":"21702210343138581780","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41360802512999,"sku":"15267430617514538763","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41360802545767,"sku":"17906705187349489401","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41360802578535,"sku":"18902907169616179970","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41360802611303,"sku":"21224027241640367724","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41360802644071,"sku":"17509667312630144792","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41360802676839,"sku":"10035123699193432912","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41360802709607,"sku":"24940707151810306637","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41360802742375,"sku":"92565189352772419558","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41360802775143,"sku":"32047062844966575297","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41360802807911,"sku":"32025714859060453686","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41360802840679,"sku":"21225440860150466112","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41360802873447,"sku":"10904529028857059765","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41360802906215,"sku":"33299598630606842253","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41360802938983,"sku":"31672409445102795733","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41360802971751,"sku":"73881432194075432060","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/corekeeper-strong-nuclear-force-fusion-bond-pixel-tee_front_mc17_black.png?v=1793673274"},{"product_id":"the-spark-herald-electromagnetism-lightning-command-pixel-tee","title":"The Spark Herald – Electromagnetism \/ Lightning Command Physics T-Shirt","description":"\u003cp\u003eEnergy reaches your lamp through the space around the wire, not inside it. Maxwell’s equations predict light, and Poynting showed in 1884 that energy flows where electric and magnetic fields cross. Electrons in a copper wire drift slower than a snail; the lamp lights at once because the field moves at nearly light speed. The Spark Herald on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41360849961063,"sku":"11410010081433411704","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41360849993831,"sku":"68316421714542572243","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41360850026599,"sku":"27253719969489763655","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41360850059367,"sku":"11865446460066340794","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41360850092135,"sku":"11089550613725217919","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41360850124903,"sku":"17256860859544308867","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41360850157671,"sku":"15060223210354095440","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41360850190439,"sku":"23641926443069830727","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41360850223207,"sku":"79397139787500779292","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41360850255975,"sku":"18547392388459501507","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41360850288743,"sku":"13626393866478767679","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41360850321511,"sku":"21941954334659646047","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41360850354279,"sku":"20368279019667239921","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41360850387047,"sku":"10044132295044222713","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41360850419815,"sku":"10357246431635761872","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41360850452583,"sku":"14960015973538467389","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/the-spark-herald-electromagnetism-lightning-command-pixel-tee_front_01_white.png?v=1793593039"},{"product_id":"magnetron-twins-electromagnetism-polarity-lock-pixel-tee","title":"Magnetron Twins – Electromagnetism \/ Polarity Lock Physics T-Shirt","description":"\u003cp\u003eBy classical physics, there should be no magnets. Magnetism in matter comes mainly from electron spin, about one Bohr magneton each; in iron, the exchange interaction lines the spins up. Two dipoles attract nose to tail, and side by side, pointing the same way, they repel. Magnetron Twins on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41360871293031,"sku":"16296446299693546008","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41360871325799,"sku":"24741345757463641209","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41360871358567,"sku":"13912133015173875144","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41360871391335,"sku":"15537590234485462601","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41360871424103,"sku":"21557297415163725142","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41360871456871,"sku":"70341937690214156008","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41360871489639,"sku":"33359274616890661855","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41360871522407,"sku":"74057958300659747527","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41360871555175,"sku":"28869448326322746976","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41360871587943,"sku":"12947577917995929442","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41360871620711,"sku":"88028395925522679723","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41360871653479,"sku":"48632094836686506907","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41360871686247,"sku":"70869425721454827494","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41360871719015,"sku":"22068385177319412156","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41360871751783,"sku":"25397256696363839916","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41360871784551,"sku":"15507303417531093160","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/magnetron-twins-electromagnetism-polarity-lock-pixel-tee_front_01_white.png?v=1793590278"},{"product_id":"decay-dancer-weak-nuclear-force-beta-decay-pixel-tee","title":"Decay Dancer – Weak Nuclear Force \/ Beta Decay Physics T-Shirt","description":"\u003cp\u003eInside some nuclei, a neutron quietly changes its identity. In beta-minus decay the weak force turns a neutron into a proton, emitting an electron and an antineutrino. Decay Dancer wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41363190284391,"sku":"31059760345950807776","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41363190317159,"sku":"12838543370821846987","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41363190349927,"sku":"10030431711369130275","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41363190382695,"sku":"10683181674421106774","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41363190415463,"sku":"26405960616784502369","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41363190448231,"sku":"15742888482217926554","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41363190480999,"sku":"66657839479998167815","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41363190513767,"sku":"26141334232435620955","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41363190546535,"sku":"26383795996976848396","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41363190579303,"sku":"33167301032594189440","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41363190612071,"sku":"27768163054702819492","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41363190644839,"sku":"33292213786062617467","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41363190677607,"sku":"32924728908141459722","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41363190710375,"sku":"23186839700594748841","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41363190743143,"sku":"32447214353593335658","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41363190775911,"sku":"27797187225288244036","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/decay-dancer-weak-nuclear-force-beta-decay-pixel-tee_front_16_white.png?v=1793592980"},{"product_id":"forceshift-weak-nuclear-force-quantum-tunneling-pixel-tee","title":"ForceShift – Quantum Tunnelling \/ Barrier Penetration Physics T-Shirt","description":"\u003cp\u003eA wall you cannot climb is not always a wall you cannot cross. Tunnelling lets a quantum particle cross a barrier it could not climb classically. It drives alpha decay and aids solar fusion. ForceShift wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"PixelatedPhysics","offers":[{"title":"White \/ S","offer_id":41363307528295,"sku":"20679672740231362426","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41363307561063,"sku":"13391694644790940136","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41363307593831,"sku":"10674307725384450852","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41363307626599,"sku":"11186869993786411767","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41363307659367,"sku":"24522078844904359620","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41363307692135,"sku":"17833552896969226217","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41363307724903,"sku":"12822129453090389175","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41363307757671,"sku":"33148624626281519983","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41363307790439,"sku":"18506843169901364154","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41363307823207,"sku":"12877631318992572938","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41363307855975,"sku":"30533007079178412828","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41363307888743,"sku":"10673597090285689963","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41363307921511,"sku":"40791947688076599533","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41363307954279,"sku":"16032223274641699493","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41363307987047,"sku":"88487810485526814243","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41363308019815,"sku":"23377779254075616541","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/forceshift-weak-nuclear-force-quantum-tunneling-pixel-tee_front_16_white.png?v=1793609928"},{"product_id":"w-zed-weak-nuclear-force-boson-carrier-pixel-tee","title":"W-ZED – Weak Nuclear Force \/ Boson Carrier Physics T-Shirt","description":"\u003cp\u003eThe weak force is carried by particles heavy enough to keep it short-ranged. The W and Z bosons carry the weak force; the W lets quarks change flavour, as in beta decay. Both found at CERN in 1983. W-ZED wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41363310641255,"sku":"21040319465185376129","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41363310674023,"sku":"18724199666874843203","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41363310706791,"sku":"33915391943129798378","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41363310739559,"sku":"25441893890744332900","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41363310772327,"sku":"27156806612800012788","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41363310805095,"sku":"16597665255483361100","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41363310837863,"sku":"27305568629019552409","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41363310870631,"sku":"14280495248392156936","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41363310903399,"sku":"24966416842151729587","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41363310936167,"sku":"12618088316463682582","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41363310968935,"sku":"21493085029404870338","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41363311001703,"sku":"20043750707890716742","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41363311034471,"sku":"29835790187646603396","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41363311067239,"sku":"47883714778137544251","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41363311100007,"sku":"27467150003840762469","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41363311132775,"sku":"49224397047341368972","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/w-zed-weak-nuclear-force-boson-carrier-pixel-tee_front_02_white.png?v=1793593095"},{"product_id":"δ-x-the-heisenberg-runner-uncertainty-principle-pixel-tee","title":"Δ-X – The Heisenberg Runner \/ Uncertainty Principle Physics T-Shirt","description":"\u003cp\u003eSqueeze a quantum particle’s position and its momentum spreads out. Δ-X runs on the uncertainty relation: the tighter a quantum state’s position spread Δx, the wider its momentum spread Δp. Δ-X wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41363710148711,"sku":"17773177193472555822","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41363710181479,"sku":"76335803700959404996","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41363710214247,"sku":"21071340214213088398","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41363710247015,"sku":"10345476281814488521","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41363710279783,"sku":"31930111668601214281","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41363710312551,"sku":"61535292943576105103","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41363710345319,"sku":"27645235307508690084","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41363710378087,"sku":"17930147183962479627","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41363710410855,"sku":"40446366025414448357","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41363710443623,"sku":"27163157101071596955","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41363710476391,"sku":"14388249352407123854","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41363710509159,"sku":"68262656066430090803","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41363710541927,"sku":"63253538763570908077","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41363710574695,"sku":"37012688719367887453","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41363710607463,"sku":"71718604088027403113","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41363710640231,"sku":"29138291654093734182","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/x-the-heisenberg-runner-uncertainty-principle-pixel-tee_front_16_white.png?v=1793593126"},{"product_id":"quavo-lia-the-entangled-twins-quantum-connection-pixel-tee","title":"Quavo \u0026 Lia – The Entangled Twins \/ Quantum Connection Physics T-Shirt","description":"\u003cp\u003eEach twin alone is pure chance. Together they always disagree. In the spin singlet, measurements along any common axis are always opposite, yet each spin on its own is exactly fifty-fifty, so no message passes. Bell showed in 1964 that no preset instructions can explain the correlations. Quavo \u0026amp; Lia on a pixel-art unisex tee; equation, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41363783385191,"sku":"32488649020696223983","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41363783417959,"sku":"32151527331327665049","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41363783450727,"sku":"20371870789123884892","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41363783483495,"sku":"12381189682574568339","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41363783516263,"sku":"19063145548264350868","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41363783549031,"sku":"60590115685306061876","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41363783581799,"sku":"22595915172554433296","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41363783614567,"sku":"30780527661746313247","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41363783647335,"sku":"22785988097223013422","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41363783680103,"sku":"20349919365465809684","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41363783712871,"sku":"20054813957323216081","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41363783745639,"sku":"20735695786855380592","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41363783778407,"sku":"11074111810045224852","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41363783811175,"sku":"71326622259404050266","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41363783843943,"sku":"32347996398010345919","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41363783876711,"sku":"23073247699591372851","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/quavo-lia-the-entangled-twins-quantum-connection-pixel-tee_front_01_white.png?v=1793593156"},{"product_id":"reflexia-the-nonlocal-mirror-quantum-nonlocality-pixel-tee","title":"Reflexia – The Nonlocal Mirror \/ Quantum Nonlocality Physics T-Shirt","description":"\u003cp\u003eTwo particles, far apart, keep answering in step, and no message passes between them. Bell tests show entangled particles share correlations no local theory explains, yet no signal passes. Reflexia wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"Black \/ S","offer_id":41365259026535,"sku":"24335342775303117914","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41365259059303,"sku":"31844301696195763306","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41365259092071,"sku":"17915091735785006837","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41365259124839,"sku":"11820455206577291747","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41365259157607,"sku":"34589710752201704122","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41365259190375,"sku":"22218646444377408818","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41365259223143,"sku":"21271534712671148174","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41365259255911,"sku":"33610507964881661975","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/reflexia-the-nonlocal-mirror-quantum-nonlocality-pixel-tee_front_02_black.png?v=1793590343"},{"product_id":"decoherex-the-interference-quantum-decoherence-pixel-tee","title":"Decoherex – The Interference \/ Quantum Decoherence Physics T-Shirt","description":"\u003cp\u003eWhy don’t chairs show interference? Because the world keeps watching them. Decoherence: a quantum system entangled with its environment loses interference and looks classical. Decoherex personifies it. Decoherex wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41365262827623,"sku":"22179560506316865092","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41365262860391,"sku":"11975904329255265207","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41365262893159,"sku":"42564373754881972052","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41365262925927,"sku":"85667706489440357326","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41365262958695,"sku":"21885566170911904624","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41365262991463,"sku":"16565549200342985854","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41365263024231,"sku":"28744376410384592309","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41365263056999,"sku":"69463705854836839448","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41365263089767,"sku":"61644092616611515343","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41365263122535,"sku":"23223363834970260397","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41365263155303,"sku":"12414887424841485634","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41365263188071,"sku":"10871345148751472099","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41365263220839,"sku":"30485987989679369364","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41365263253607,"sku":"32197432989723599034","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41365263286375,"sku":"21631955272954776214","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41365263319143,"sku":"29218418578292585799","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/decoherex-the-interference-quantum-decoherence-pixel-tee_front_01_white.png?v=1793590229"},{"product_id":"oscillayne-the-harmonic-pulse-waveform-resonance-pixel-tee","title":"Oscillayne – The Harmonic Pulse \/ Waveform Resonance Physics T-Shirt","description":"\u003cp\u003ePush a swing at just the right moment and it climbs higher each time. Resonance: drive a system at its natural frequency and small pushes build into large oscillations. Oscillayne personifies it. Oscillayne wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41365874802791,"sku":"11574946845933041464","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41365874835559,"sku":"92035625938152464976","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41365874868327,"sku":"33310004316973488489","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41365874901095,"sku":"35278768461756613043","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41365874933863,"sku":"15994712097251148715","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41365874966631,"sku":"32412652177305066692","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41365874999399,"sku":"32709729767740911974","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41365875032167,"sku":"33280772693263801972","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41365875064935,"sku":"29939330837126958786","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41365875097703,"sku":"25486856826633514315","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41365875130471,"sku":"12617335362281062140","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41365875163239,"sku":"27579489176399125374","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41365875196007,"sku":"17140730872453318671","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41365875228775,"sku":"98590707236368254071","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41365875261543,"sku":"19623020738677386067","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41365875294311,"sku":"33859938035568035482","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/oscillayne-the-harmonic-pulse-waveform-resonance-pixel-tee_front_02_white.png?v=1793590299"},{"product_id":"interfera-the-path-unchosen-quantum-interference-pixel-tee","title":"Interfera – The Path Unchosen \/ Quantum Interference Physics T-Shirt","description":"\u003cp\u003eSend particles through two paths, one at a time, and stripes still appear. Quantum interference: probability amplitudes add or cancel, so even single particles build wave patterns. Interfera wears it in pixel art on a unisex tee. The physics panel below has the equation, every symbol and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":41365875720295,"sku":"33554018608902216873","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":41365875753063,"sku":"24253415211383388859","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":41365875785831,"sku":"24803530645055413255","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":41365875818599,"sku":"85623701283947136303","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":41365875851367,"sku":"33973532991244875124","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":41365875884135,"sku":"61282046126355042548","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":41365875916903,"sku":"22684970641028164191","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":41365875949671,"sku":"28524777459529310051","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":41365875982439,"sku":"32041801747047987213","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":41365876015207,"sku":"27672001936827241695","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":41365876047975,"sku":"31794182763735843342","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":41365876080743,"sku":"34152170804742212357","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":41365876113511,"sku":"21601000536521009963","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":41365876146279,"sku":"32250630192367997155","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":41365876179047,"sku":"19057677912077931036","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":41365876211815,"sku":"17968158423526422732","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/interfera-the-path-unchosen-quantum-interference-pixel-tee_front_02_white.png?v=1793590209"},{"product_id":"exclusor-pauli-exclusion-principle-degeneracy-pressure-pixel-tee","title":"Exclusor – Pauli Exclusion Principle \/ Degeneracy Pressure Physics T-Shirt","description":"\u003cp\u003eExclusor is a Pixelated Physics character, one of our quantum designs. No two identical fermions can occupy the same quantum state. Exclusor, Pauli’s bouncer, keeps neon’s shells full. This is a pixel-art unisex T-shirt. The physics panel below gives the equation, what each symbol means and the sources.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"White \/ S","offer_id":50369884651623,"sku":"83020686047807848647","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":50369884684391,"sku":"14041989908346302804","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":50369884717159,"sku":"32960127357225786160","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":50369884749927,"sku":"97926100252270482144","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":50369884782695,"sku":"50619523159330629760","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":50369884815463,"sku":"31239579823846352290","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":50369884848231,"sku":"55225693575506235394","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":50369884880999,"sku":"15761545046529880545","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":50369884913767,"sku":"95013611727476200415","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":50369884946535,"sku":"14455328530097495078","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":50369884979303,"sku":"26630227581944311784","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":50369885012071,"sku":"32710411724980279137","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 4XL","offer_id":50369885044839,"sku":"32862476862043119528","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":50369885077607,"sku":"16772114673560536118","price":29.99,"currency_code":"USD","in_stock":true},{"title":"White \/ 5XL","offer_id":50369885110375,"sku":"33055840455923344036","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":50369885143143,"sku":"14747355642729007234","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/exclusor-pauli-exclusion-principle-degeneracy-pressure-pixel-tee_front_16_white.png?v=1793590249"},{"product_id":"bose-einstein-condensate-1995-tee","title":"Bose-Einstein Condensate 1995 Tee","description":"\u003cp\u003eMeet The Condensate Queen, who gathers thousands of atoms into a single quantum state. Cool a gas of bosons until each atom's quantum wave is as wide as the gap between atoms, and a large fraction drops into the lowest state together: a Bose-Einstein condensate. In 1995 Eric Cornell and Carl Wieman at JILA did it first in a gas, with rubidium-87 at about 170 nanokelvin, and Wolfgang Ketterle at MIT followed with sodium. The three shared the 2001 Nobel Prize. The Condensate Queen on a pixel-art unisex tee; equations, symbols and sources in the physics panel below.\u003c\/p\u003e\u003cp\u003e\"Many atoms, one wave.\"\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50912523911271,"sku":"11244998780493004699","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50912523944039,"sku":"12195702036656132836","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50912523976807,"sku":"22525899079448987628","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50912524009575,"sku":"27057823960947727132","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50912524042343,"sku":"27167176319659351791","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50912524075111,"sku":"24796323848599678726","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50912524107879,"sku":"28202543201502338822","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50912524140647,"sku":"12530892821443083145","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50912524173415,"sku":"92058893967107621753","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50912524206183,"sku":"31693069791349396946","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50912524238951,"sku":"32278276941304261285","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50912524271719,"sku":"80564468223937166478","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50912524304487,"sku":"52407553463320821580","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50912524337255,"sku":"25451866566206390121","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50912524370023,"sku":"16962449805237729532","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50912524402791,"sku":"32248900142447239698","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/bec-1995_front_02_white.png?v=1793581712"},{"product_id":"chandrasekhar-limit-tee-1-4-m","title":"Chandrasekhar Limit Tee: 1.4 M☉","description":"\u003cp\u003eMeet The Limit Keeper, guardian of the heaviest white dwarf. A white dwarf is held up not by heat but by electrons that refuse to share quantum states. In 1931 Subrahmanyan Chandrasekhar showed that when those electrons move close to the speed of light, their pressure can no longer beat gravity above a certain mass: about 1.4 times the mass of the Sun for a carbon-oxygen star. The work was part of his 1983 Nobel Prize. The Limit Keeper on a pixel-art unisex tee; equations, symbols and sources in the physics panel below.\u003c\/p\u003e\u003cp\u003e\"One point four, and not a grain more.\"\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50912549011559,"sku":"21548233801364241450","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50912549044327,"sku":"76288944007808053209","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50912549077095,"sku":"29145428202193885289","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50912549109863,"sku":"71201092090521709874","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50912549142631,"sku":"25352601809774491024","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50912549175399,"sku":"20888607447500290945","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50912549208167,"sku":"19872051315797802567","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50912549240935,"sku":"16924991236902731167","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50912549273703,"sku":"56240511732606589222","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50912549306471,"sku":"26490002662348455118","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50912549339239,"sku":"55430159473368899734","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50912549372007,"sku":"14817105546232216615","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50912549404775,"sku":"16528312117248117349","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50912549437543,"sku":"29464716532287777435","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50912549470311,"sku":"87396618416603493700","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50912549503079,"sku":"78809680588126955075","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/chandrasekhar_front_17_white.png?v=1793581736"},{"product_id":"qed-vertex-tee-alpha-near-1-137","title":"QED Vertex Tee: Alpha Near 1\/137","description":"\u003cp\u003eMeet The Vertex Smith, who forges every meeting of electron and photon. In quantum electrodynamics (QED), every electromagnetic interaction of charged particles is built from one junction: a charged particle line meeting a photon line. Its strength is the fine-structure constant, α = e²\/(4πε₀ħc) ≈ 1\/137.036 at low energy, and each vertex costs a factor √α ≈ 0.085, which is why QED predictions converge fast and are so precise. The Vertex Smith on a pixel-art unisex tee; equations, symbols and sources in the physics panel below.\u003c\/p\u003e\u003cp\u003e\"One joint, all of electromagnetism.\"\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50912557727847,"sku":"25819215191839127565","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50912557760615,"sku":"32022931943026201118","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50912557793383,"sku":"21885833652682317501","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50912557826151,"sku":"19772597313950266339","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50912557858919,"sku":"30028563343788217464","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50912557891687,"sku":"30443279511086086382","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50912557924455,"sku":"30785208505322478492","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50912557957223,"sku":"18745704947815236915","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50912557989991,"sku":"12309453190177600610","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50912558022759,"sku":"15015278845833085512","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50912558055527,"sku":"11916034000415049958","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50912558088295,"sku":"30786578119870512845","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50912558121063,"sku":"15325472390244853682","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50912558153831,"sku":"28067110839921543089","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50912558186599,"sku":"11003785749306982171","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50912558219367,"sku":"12899488823374836023","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/qed-vertex_front_16_white.png?v=1793581774"},{"product_id":"unruh-effect-tee","title":"Unruh Effect Tee","description":"\u003cp\u003eMeet The Accelerant, who feels warmth in empty space only because it never stops speeding up. In 1976 William Unruh showed that an observer with constant proper acceleration a sees the quantum vacuum as a thermal bath at temperature T = ħa\/(2πck_B), while an observer at rest sees nothing. The effect is tiny: about 4×10⁻²⁰ kelvin at Earth's surface gravity, and it takes 10²⁰ m\/s² to reach 0.4 K. It is a firm prediction of quantum field theory but has not yet been directly observed. The Accelerant on a pixel-art unisex tee; equations, symbols and sources in the physics panel below.\u003c\/p\u003e\u003cp\u003e\"Empty to you. Warm to me.\"\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50912566444135,"sku":"31417709531407349397","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50912566476903,"sku":"19741194008288244065","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50912566509671,"sku":"57325616814284823388","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50912566542439,"sku":"95513643762773611922","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50912566575207,"sku":"76091830150100766837","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50912566607975,"sku":"44638951068513120500","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50912566640743,"sku":"13761840919258091666","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50912566673511,"sku":"13321786508898387831","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50912566706279,"sku":"30935462656088052095","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50912566739047,"sku":"19575521312577286788","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50912566771815,"sku":"33685713488769601064","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50912566804583,"sku":"32666012325566351296","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50912566837351,"sku":"35655351641272361402","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50912566870119,"sku":"14525513012649792532","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50912566902887,"sku":"98226543195899125238","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50912566935655,"sku":"15619530025261758474","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/unruh_front_02_white.png?v=1793581807"},{"product_id":"arnolds-cat-cat-map-chaos-physics-t-shirt","title":"Arnold's Cat – Cat Map Chaos Physics T-Shirt","description":"\u003cp\u003eArnold's Cat gets sheared into stripes, scrambled into noise and then, on a 124×124 pixel grid, snaps back whole after exactly 15 steps. The map (x, y) → (x + y, x + 2y) mod 1 stretches by a factor of about 2.618 each step and squeezes by 0.382, so area is kept while the picture turns chaotic. On a finite grid no pixel is ever lost, only moved, so the shuffle must repeat. Arnold's Cat on a pixel-art unisex tee; equations, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50913873952871,"sku":"20871099428214396403","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50913873985639,"sku":"28232316689424565161","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50913874018407,"sku":"11563704755987410656","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50913874051175,"sku":"29034265225476504754","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50913874083943,"sku":"29131126288357576046","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50913874116711,"sku":"16717287507378021705","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50913874149479,"sku":"27858861763286354088","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50913874182247,"sku":"32321008425642856689","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50913874215015,"sku":"32710396829939875264","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50913874247783,"sku":"31475973738577713950","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50913874280551,"sku":"26228707207508062031","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50913874313319,"sku":"20174020602458628430","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50913874346087,"sku":"35884912154280454721","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50913874378855,"sku":"11144725582945588840","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50913874411623,"sku":"19285362782488893618","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50913874444391,"sku":"89662946512430088207","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/arnold-cat-map_front_01_white.png?v=1793582035"},{"product_id":"theta-warden-strong-cp-problem-physics-t-shirt","title":"Theta Warden – Strong CP Problem Physics T-Shirt","description":"\u003cp\u003eTheta Warden holds a balance that nature never promised to keep level. The strong force is allowed a term, set by an angle θ̄, that would break CP symmetry and give the neutron an electric dipole moment. Experiments find none: |d_n| \u0026lt; 1.8×10⁻²⁶ e·cm (PSI, 2020), so |θ̄| ≲ 10⁻¹⁰. Why it is so small is an open question; the axion is one proposed answer, not yet seen. Theta Warden on a pixel-art unisex tee; equations, symbols and sources in the panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50913928544359,"sku":"29321362559776729561","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50913928577127,"sku":"45900098836700308462","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50913928609895,"sku":"63835468233680609503","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50913928642663,"sku":"18966686580744138247","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50913928675431,"sku":"56874498409127480711","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50913928708199,"sku":"26554235835041789987","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50913928740967,"sku":"20031528587876333171","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50913928773735,"sku":"58016690037556660633","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50913928806503,"sku":"92832630362018068761","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50913928839271,"sku":"62468336737119444250","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50913928872039,"sku":"45268476432148972842","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50913928904807,"sku":"27950297305476183746","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50913928937575,"sku":"12559794663737859700","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50913928970343,"sku":"29323992083713451918","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50913929003111,"sku":"58532755597270987531","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50913929035879,"sku":"34458585273241044522","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/strong-cp_front_01_white.png?v=1793581791"},{"product_id":"sprinkla-the-reverse-sprinkler-physics-t-shirt","title":"Sprinkla – The Reverse Sprinkler Physics T-Shirt","description":"\u003cp\u003eSprinkla spins on one toe, arms bent like a lawn sprinkler. Run her backwards, sucking water in, and she still turns.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eA sprinkler that sprays water spins because of the jets' reaction. Run it in reverse underwater, sucking water in, and it turns the other way, unsteadily and about 40 times slower than forward at the same flow rate. The curved arms fling the inflow outward, so the two jets meeting in the hub miss head-on and push it round.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eτ = ρ Q v r   (forward, held still)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eτ: stall torque (N·m)\u003c\/li\u003e\n\u003cli\u003eρ: fluid density (kg\/m³)\u003c\/li\u003e\n\u003cli\u003eQ: volume flow rate (m³\/s)\u003c\/li\u003e\n\u003cli\u003ev: jet exit speed (m\/s)\u003c\/li\u003e\n\u003cli\u003er: arm radius (m)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eMach posed it in 1883, Feynman popularised it, and it was settled experimentally in 2024 by K. Wang, B. Sprinkle, M. Zuo and L. Ristroph (Phys. Rev. Lett. 132, 044003).\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The torque formula is an ideal, tangential-jet idealisation.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Sprinkla, the pixel-art character, with the title. Back: the forward torque, the reverse-rotation result, the hub-jet explanation and the 2024 paper. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936406376551,"sku":"14845796188131032483","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936406409319,"sku":"15076970121774504163","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936406442087,"sku":"65032681808673023003","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936406474855,"sku":"27921712647958855166","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936406507623,"sku":"78348159292661959397","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936406540391,"sku":"16044053953014586808","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936406573159,"sku":"12662641510850278777","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936406605927,"sku":"16809928101505687362","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936406638695,"sku":"68341363496558365580","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936406671463,"sku":"33680229515537327698","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936406704231,"sku":"13668312739634147180","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936406736999,"sku":"19636916650022580601","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936406769767,"sku":"87145276455926535413","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936406802535,"sku":"11697076533900460366","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936406835303,"sku":"12383371261084007564","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936406868071,"sku":"20670268042534915145","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/feynman-sprinkler_front_16_white.png?v=1793595132"},{"product_id":"triumvira-the-ghz-state-physics-t-shirt","title":"Triumvira – The GHZ State Physics T-Shirt","description":"\u003cp\u003eThree sisters, palms together, each holding an X or Y rune. One run, and the hidden variables have nowhere to hide.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eThree qubits are entangled in a GHZ state. Quantum mechanics says certain products of X and Y measurements are −1 with certainty. If each result were a pre-set local value of ±1, multiplying those three products would force XXX = −1, but quantum mechanics says XXX = +1. This is Bell's theorem without inequalities.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e|GHZ⟩ = (|000⟩ + |111⟩)\/√2\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e|000⟩, |111⟩: all three qubits in state 0, or all in state 1\u003c\/li\u003e\n\u003cli\u003eX, Y: Pauli spin or polarisation measurements on each qubit, outcomes ±1 (dimensionless)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eGreenberger, Horne and Zeilinger introduced it in 1989; Pan et al. tested it with three photons (Nature, 2000).\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Triumvira, the pixel-art character, with the title. Back: the GHZ state, the three certain results, the hidden-variable contradiction and both sources. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936415092839,"sku":"15383071388239889146","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936415125607,"sku":"19514952274169617967","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936415158375,"sku":"34237753500853184765","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936415191143,"sku":"13015460420873381054","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936415223911,"sku":"28408944948064127930","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936415256679,"sku":"71596211679642201349","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936415289447,"sku":"70697928115935270120","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936415322215,"sku":"69224096208809655714","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936415354983,"sku":"32735300252951288891","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936415387751,"sku":"25677413837411251451","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936415420519,"sku":"98346193890442768997","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936415453287,"sku":"23146392023780156337","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936415486055,"sku":"33801257657760838418","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936415518823,"sku":"32688050998062841171","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936415551591,"sku":"26084114298175898136","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936415584359,"sku":"11408362501625449306","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/ghz-state_front_01_white.png?v=1793595152"},{"product_id":"papilla-hofstadters-butterfly-physics-t-shirt","title":"Papilla – Hofstadter's Butterfly Physics T-Shirt","description":"\u003cp\u003ePapilla's wings are made of allowed energies. Turn up the magnetic field and her pattern repeats inside itself, forever.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003ePut an electron on a 2-D lattice in a magnetic field and its allowed energies depend on the flux through each cell. When the flux ratio is a fraction p\/q, the band splits into q subbands; when it is irrational, the spectrum becomes a Cantor set. Plotted against the flux, the energies form a self-similar butterfly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eψ_{n+1} + ψ_{n−1} + 2 cos(2πnα − ν) ψ_n = E ψ_n,   α = Φ\/Φ₀\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eψ_n: wavefunction amplitude on row n (dimensionless)\u003c\/li\u003e\n\u003cli\u003eα: flux per cell in flux quanta (dimensionless)\u003c\/li\u003e\n\u003cli\u003eΦ: magnetic flux through one cell (Wb)\u003c\/li\u003e\n\u003cli\u003eΦ₀: flux quantum h\/e (Wb)\u003c\/li\u003e\n\u003cli\u003eν: phase (rad)\u003c\/li\u003e\n\u003cli\u003eE: energy in units of the hopping energy t (dimensionless)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDouglas Hofstadter computed the spectrum in 1976; in 2013 graphene moiré superlattices showed its fingerprints in experiments.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e Those experiments saw butterfly features, not the whole fractal.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Papilla, the pixel-art character, with the title. Back: Harper's equation, the p\/q rule, the Cantor-set limit and the 1976 and 2013 sources. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936423809127,"sku":"24514473121024317917","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936423841895,"sku":"22917331663404980497","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936423874663,"sku":"22577136792632353747","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936423907431,"sku":"20271402960609501284","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936423940199,"sku":"27330723619580894410","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936423972967,"sku":"10435240210161079499","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936424005735,"sku":"29024263304547455512","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936424038503,"sku":"12834058414266461556","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936424071271,"sku":"29672131250800659822","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936424104039,"sku":"27247775413272444321","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936424136807,"sku":"94758219692805567217","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936424169575,"sku":"18892129280176307588","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936424202343,"sku":"24750266961566727583","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936424235111,"sku":"12230344499082881539","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936424267879,"sku":"27014172608399633319","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936424300647,"sku":"32082559289615077922","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/hofstadter-butterfly_front_02_white.png?v=1793595175"},{"product_id":"trialpha-the-hoyle-state-physics-t-shirt","title":"Trialpha – The Hoyle State Physics T-Shirt","description":"\u003cp\u003eTrialpha juggles three helium nuclei inside a star. For a moment they become carbon, and that is why you exist.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eStars make carbon by fusing three helium-4 nuclei (alpha particles), which only works well because carbon-12 has an excited state at just the right energy. The Hoyle state sits at 7.654 MeV, spin-parity 0⁺, about 0.38 MeV above the 7.275 MeV three-alpha threshold. It almost always falls apart again; only rarely does it settle down into ordinary carbon.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e3 ⁴He → ¹²C*(7.654 MeV, 0⁺) → ¹²C + γγ (rarely)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e⁴He: helium-4 nucleus, alpha particle\u003c\/li\u003e\n\u003cli\u003e¹²C*: excited carbon-12 nucleus\u003c\/li\u003e\n\u003cli\u003eMeV: mega-electronvolt, 1.602 × 10⁻¹³ J\u003c\/li\u003e\n\u003cli\u003e0⁺: spin 0, positive parity\u003c\/li\u003e\n\u003cli\u003eγ: gamma-ray photon\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn 1953 Fred Hoyle predicted a carbon level near 7.7 MeV; a Caltech team measured 7.68 ± 0.03 MeV, and Cook, Fowler and Lauritsen assigned it 0⁺ in 1957.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Trialpha, the pixel-art character, with the title. Back: the three-alpha reaction, the resonance energy and threshold, the 1953 prediction and measurement and the 1957 assignment. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936432525415,"sku":"22652936874482201127","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936432558183,"sku":"71911022184200434333","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936432590951,"sku":"30566950877175491845","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936432623719,"sku":"14653659204967258015","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936432656487,"sku":"20675468488066811844","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936432689255,"sku":"33976067365766092968","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936432722023,"sku":"20864069568043161218","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936432754791,"sku":"26617806807984211629","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936432787559,"sku":"33843176996744227028","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936432820327,"sku":"13652731648946445943","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936432853095,"sku":"52508015435515146650","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936432885863,"sku":"59212858998832410490","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936432918631,"sku":"27055110082734750230","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936432951399,"sku":"42768840300105993837","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936432984167,"sku":"17491027862479093433","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936433016935,"sku":"24850689881990527985","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/hoyle-state_front_16_white.png?v=1793595193"},{"product_id":"celtrix-the-rattleback-physics-t-shirt","title":"Celtrix – The Rattleback Physics T-Shirt","description":"\u003cp\u003eSpin Celtrix the wrong way and she wobbles, rattles, and spins back the other way.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eA rattleback is a boat-shaped top whose mass axes are slightly twisted relative to its curved base (δ ≠ 0). Friction at the contact point couples wobbling to spinning, so in the unfavoured direction spin turns into rocking and then back into spin the other way. Angular momentum is not violated: the friction force at the contact exerts the torque.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003edL\/dt = r_c × F_c\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eL: angular momentum (kg·m²\/s)\u003c\/li\u003e\n\u003cli\u003et: time (s)\u003c\/li\u003e\n\u003cli\u003er_c: position of the contact point from the centre of mass (m)\u003c\/li\u003e\n\u003cli\u003eF_c: contact force from the table (N)\u003c\/li\u003e\n\u003cli\u003eδ: misalignment angle (rad)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eG. T. Walker analysed it in 1896.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e Some celts reverse more than once; not every rattleback reverses in only one direction.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Celtrix, the pixel-art character, with the title. Back: the torque equation, the misalignment angle, the friction explanation and Walker's 1896 paper. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936441307239,"sku":"23796504507699589674","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936441340007,"sku":"16702883706018209189","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936441372775,"sku":"71550508608660282453","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936441405543,"sku":"29524288225021342243","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936441438311,"sku":"11728669484770819102","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936441471079,"sku":"20664476171096720969","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936441503847,"sku":"25655946295122765397","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936441536615,"sku":"15187652532453987124","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936441569383,"sku":"29824680608311999307","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936441602151,"sku":"25682074591300178539","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936441634919,"sku":"56487426646071066892","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936441667687,"sku":"25329735574695604533","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936441700455,"sku":"28639990603977092679","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936441733223,"sku":"20251188424276873159","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936441765991,"sku":"13893538756324856470","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936441798759,"sku":"24401275607104227594","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/rattleback_front_16_white.png?v=1793595212"},{"product_id":"twinne-twynne-the-twin-paradox-physics-t-shirt","title":"Twinne \u0026 Twynne – The Twin Paradox Physics T-Shirt","description":"\u003cp\u003eTwinne stays home. Twynne flies out at 0.8c and back. They meet again 20 years later for one of them and 12 for the other.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eEach clock records the proper time along its own path through spacetime. The traveller's path is shorter in proper time, so at 0.8c a 20-year round trip on Earth lasts 12 years for the traveller. The gap comes from the geometry of the two paths, not from acceleration itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eτ = ∫ √(1 − v²\/c²) dt\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eτ: proper time on the clock (s)\u003c\/li\u003e\n\u003cli\u003ev: clock speed (m\/s)\u003c\/li\u003e\n\u003cli\u003ec: speed of light (m\/s)\u003c\/li\u003e\n\u003cli\u003et: Earth-frame time (s)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eEinstein predicted the clock effect in 1905, and Paul Langevin recast it as a human traveller in 1911.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Twinne \u0026amp; Twynne, the pixel-art character, with the title. Back: the proper-time integral, the 0.8c worked example, the geometry note and the 1905 and 1911 sources. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936450089063,"sku":"12049429195297266262","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936450121831,"sku":"22508556025200180239","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936450154599,"sku":"23010577820714975618","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936450187367,"sku":"13077713451821439077","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936450220135,"sku":"32718273146642267030","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936450252903,"sku":"22652741322964829331","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936450285671,"sku":"20013412527330675835","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936450318439,"sku":"13788424077865772251","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936450351207,"sku":"60716632633686902528","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936450383975,"sku":"23268972601941667967","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936450416743,"sku":"32364692383906308132","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936450449511,"sku":"27967635298713154749","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936450482279,"sku":"18273298242788225842","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936450515047,"sku":"17559007317402298445","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936450547815,"sku":"37297535258945046871","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936450580583,"sku":"15533427900947116897","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/twin-paradox_front_01_white.png?v=1793595231"},{"product_id":"reversa-loschmidts-reversal-paradox-physics-t-shirt","title":"Reversa – Loschmidt's Reversal Paradox Physics T-Shirt","description":"\u003cp\u003eReversa flips every molecule's velocity, and the gas should un-mix. So why does time only run one way?\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eNewton's laws run equally well backwards, yet Boltzmann's H-theorem says a gas always heads toward equilibrium. Reverse every velocity and the gas would retrace its steps, so the arrow of time cannot come from the dynamics alone. The H-theorem rests on the molecular-chaos assumption.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eH = ∫ f ln f d³v,   dH\/dt ≤ 0\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eH: Boltzmann's H function (dimensionless, per volume)\u003c\/li\u003e\n\u003cli\u003ef: velocity distribution (s³\/m⁶)\u003c\/li\u003e\n\u003cli\u003ed³v: velocity-space volume element (m³\/s³)\u003c\/li\u003e\n\u003cli\u003et: time (s)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eJosef Loschmidt raised the objection in 1876.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e This does not break the second law. Why the past had low entropy is still debated.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Reversa, the pixel-art character, with the title. Back: the reversibility of Newton's laws, Boltzmann's H-theorem, the molecular-chaos note and the 1876 objection. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936458805351,"sku":"52492985517795476735","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936458838119,"sku":"27153157856116651434","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936458870887,"sku":"75005572840363112169","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936458903655,"sku":"16658486355801121853","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936458936423,"sku":"24065271096957195599","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936458969191,"sku":"54830085803767263488","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936459001959,"sku":"60938023658904247728","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936459034727,"sku":"21508821838431644940","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936459067495,"sku":"13918356242411052136","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936459100263,"sku":"58238387348326555283","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936459133031,"sku":"11075905286663981970","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936459165799,"sku":"15732902497135046563","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936459198567,"sku":"17186272781191398963","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936459231335,"sku":"33777783714081753652","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936459264103,"sku":"12040611585280646973","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936459296871,"sku":"76383340816734682099","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/loschmidt-paradox_front_02_white.png?v=1793595249"},{"product_id":"twissa-hanbra-hanbury-brown-twiss-effect-physics-t-shirt","title":"Twissa \u0026 Hanbra – Hanbury Brown–Twiss Effect Physics T-Shirt","description":"\u003cp\u003eTwissa and Hanbra stand back to back at their searchlight dishes under Sirius. Their photons like to bunch.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eCorrelating the intensity flickers at two separate detectors measures the coherence of light, and from it the angular size of a star. For thermal light the correlation at zero delay is 2 (bunching), for ideal laser light it is 1, and for single-photon sources it is below 1 (antibunching, a purely quantum effect).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eg⁽²⁾(τ) = ⟨I(t) I(t+τ)⟩ \/ ⟨I⟩²\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eg⁽²⁾(τ): normalised intensity correlation (dimensionless)\u003c\/li\u003e\n\u003cli\u003eI: light intensity (W\/m²)\u003c\/li\u003e\n\u003cli\u003et: time (s)\u003c\/li\u003e\n\u003cli\u003eτ: delay between detectors (s)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eR. Hanbury Brown and R. Q. Twiss measured Sirius with two searchlight mirrors (Nature, 1956): angular diameter 0.0068″ ± 0.0005″.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The value 2 is the ideal for a single polarisation of thermal light; it is not what their 1956 electronics measured.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Twissa \u0026amp; Hanbra, the pixel-art character, with the title. Back: the g⁽²⁾ definition, thermal, laser and single-photon values, the Sirius result and the 1956 paper. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936467587175,"sku":"81727818627281270109","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936467619943,"sku":"24113311575291247127","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936467652711,"sku":"73684593406752473225","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936467685479,"sku":"14725626824861523754","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936467718247,"sku":"31388222395734744483","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936467751015,"sku":"29372624704669159244","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936467783783,"sku":"51208128171716317891","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936467816551,"sku":"15452900816236549288","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936467849319,"sku":"32849789872585270079","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936467882087,"sku":"13225915047083129809","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936467914855,"sku":"11331390305934484820","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936467947623,"sku":"31272634650166701825","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936467980391,"sku":"29009732237355973989","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936468013159,"sku":"19884972188726646870","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936468045927,"sku":"19540641715500592320","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936468078695,"sku":"16520317248283664150","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/hanbury-brown-twiss_front_16_white.png?v=1793595268"},{"product_id":"tethra-bells-spaceship-paradox-physics-t-shirt","title":"Tethra – Bell's Spaceship Paradox Physics T-Shirt","description":"\u003cp\u003eSame burn. Same speed. Tethra's twin rockets fly in perfect step, and the thread between them still snaps.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eTwo ships start at rest a distance L apart and accelerate identically. In the launch frame their gap stays L the whole time, but a thread moving with them is Lorentz-contracted: to span a gap of L at speed v it would need a proper length of γL. Its proper length is only L, so it is stretched and breaks. Equivalently, once both coast at speed v, in the ships' momentary rest frame their separation has grown to γL while the thread's rest length is still L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eships'-frame gap = γL,   γ = 1\/√(1 − v²\/c²)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eL: initial (and launch-frame) separation (m)\u003c\/li\u003e\n\u003cli\u003ev: final common speed (m\/s)\u003c\/li\u003e\n\u003cli\u003ec: speed of light, 299 792 458 m\/s (exact)\u003c\/li\u003e\n\u003cli\u003eγ: Lorentz factor (dimensionless)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eE. Dewan and M. Beran published the puzzle in 1959; J. S. Bell made it famous in \"How to teach special relativity\" (1976).\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The γL gap applies after both ships reach the same final speed; during acceleration they share no single rest frame.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Tethra, the pixel-art character, with the title. Back: the launch-frame and ships'-frame gaps, the Lorentz factor, the broken-thread line and both sources. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936476303463,"sku":"22432678534987512185","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936476336231,"sku":"28711729129764044286","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936476368999,"sku":"22142656146234274901","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936476401767,"sku":"24817559030383117524","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936476434535,"sku":"66835403588251029624","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936476467303,"sku":"13901987116546493631","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936476500071,"sku":"27568475392179762829","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936476532839,"sku":"19874359280744626510","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936476565607,"sku":"12903788037484701128","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936476598375,"sku":"14451382568814143916","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936476631143,"sku":"18895333195120449015","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936476663911,"sku":"29498727025405262871","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936476696679,"sku":"19783683004979210937","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936476729447,"sku":"25811672172979990656","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936476762215,"sku":"82165651579844326272","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936476794983,"sku":"18778354415194606549","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/bell-spaceship_front_01_white.png?v=1793595287"},{"product_id":"monopola-diracs-monopole-physics-t-shirt","title":"Monopola – Dirac's Monopole Physics T-Shirt","description":"\u003cp\u003eMonopola carries a single magnetic pole, field lines bursting out like a sunburst. If she exists anywhere, every charge in the universe has to fall in line.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003ePaul Dirac showed that if even one magnetic monopole exists, quantum mechanics forces all electric charge to come in whole-number steps. That would explain why charge is quantised. The monopole needs a singular line, the Dirac string, which cannot be seen if the condition holds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ee g = n ħ c \/ 2   (Gaussian units, n = 0, ±1, ±2, …)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ee: electric charge\u003c\/li\u003e\n\u003cli\u003eg: magnetic charge of the monopole\u003c\/li\u003e\n\u003cli\u003en: integer\u003c\/li\u003e\n\u003cli\u003eħ: reduced Planck constant\u003c\/li\u003e\n\u003cli\u003ec: speed of light (all in Gaussian units, as printed)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDirac published it in 1931. B. Cabrera (Stanford) recorded one candidate event on 14 Feb 1982 in 151 days of running; it was never repeated.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e No magnetic monopole has ever been confirmed. The monopole field shown on the back is hypothetical.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Monopola, the pixel-art character, with the title. Back: the Dirac quantisation condition, the hypothetical monopole field, the Cabrera candidate and both papers. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936476860519,"sku":"11518866334902415315","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936476893287,"sku":"15281197257504147691","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936476926055,"sku":"16472624918042823048","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936476958823,"sku":"19129385797276212708","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936476991591,"sku":"12989769505360002733","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936477024359,"sku":"77679233255853679718","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936477057127,"sku":"89864653297103191578","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936477089895,"sku":"59088164835209731802","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936477122663,"sku":"24406705899820514850","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936477155431,"sku":"34006237031110002503","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936477188199,"sku":"12579434324631092603","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936477220967,"sku":"67366726390316547700","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936477253735,"sku":"27517209817764868040","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936477286503,"sku":"23371448180452720342","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936477319271,"sku":"29517999673350637753","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936477352039,"sku":"26548286504627467678","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/dirac-monopole_front_16_white.png?v=1793595305"},{"product_id":"alfvena-alfven-waves-physics-t-shirt","title":"Alfvena – Alfvén Waves Physics T-Shirt","description":"\u003cp\u003eAlfvena plays the Sun like a harp. Every magnetic field line is a taut string, and when she plucks one, the plasma sings.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eIn a plasma, magnetic field lines behave like stretched strings. Shake one sideways and a transverse ripple runs along it, carrying the plasma with it. This is the shear Alfvén wave of ideal magnetohydrodynamics, and its speed is set by the field strength and the plasma's density.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ev_A = B \/ √(μ₀ρ)   and   ω = k∥ v_A\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ev_A: Alfvén speed (m\/s)\u003c\/li\u003e\n\u003cli\u003eB: magnetic field (T)\u003c\/li\u003e\n\u003cli\u003eμ₀: vacuum permeability (H\/m)\u003c\/li\u003e\n\u003cli\u003eρ: plasma mass density (kg\/m³)\u003c\/li\u003e\n\u003cli\u003eω: angular frequency (rad\/s)\u003c\/li\u003e\n\u003cli\u003ek∥: wavenumber along B (1\/m)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eHannes Alfvén predicted these waves in Nature in 1942 and shared the 1970 Nobel Prize in Physics for his work in magnetohydrodynamics.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The Sun's corona is about 1–2 million K while its surface is about 5800 K. Alfvén waves are a leading candidate for heating it, but the question is still open.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Alfvena, the pixel-art character, with the title. Back: the field-line strings, both Alfvén equations, the coronal-heating note and Alfvén's 1942 paper. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936477515879,"sku":"16780337385840635029","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936477548647,"sku":"22484073952526237850","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936477581415,"sku":"21855122388092605857","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936477614183,"sku":"16235029732903129406","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936477646951,"sku":"12305824101337216819","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936477679719,"sku":"31105950815443165712","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936477712487,"sku":"17419872990541096470","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936477745255,"sku":"23266445448017754595","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936477778023,"sku":"20151274269661578612","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936477810791,"sku":"13016604563904342609","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936477843559,"sku":"13457801050685762488","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936477876327,"sku":"31449550634181635672","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936477909095,"sku":"31056893794647601260","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936477941863,"sku":"34698053235898746615","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936477974631,"sku":"12876203958719517464","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936478007399,"sku":"78101861593361207474","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/alfven-waves_front_01_white.png?v=1793595324"},{"product_id":"murmura-the-whispering-gallery-physics-t-shirt","title":"Murmura – The Whispering Gallery Physics T-Shirt","description":"\u003cp\u003eMurmura whispers into the wall, and her voice runs all the way round to the far side.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eIn a round gallery, sound clings to the curved wall and travels around it rather than spreading through the space, so a whisper can be heard on the far side. A wave fits around the circle when a whole number of wavelengths matches the circumference. Light does the same in tiny glass rings and spheres.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e2πR ≈ m λ\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eR: radius (m)\u003c\/li\u003e\n\u003cli\u003em: whole number of wavelengths (dimensionless)\u003c\/li\u003e\n\u003cli\u003eλ: wavelength (m)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eLord Rayleigh explained the whispering gallery of St Paul's Cathedral in 1910; optical whispering-gallery resonators reach Q \u0026gt; 10¹¹.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e It is not an echo: the sound hugs the wall.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Murmura, the pixel-art character, with the title. Back: the resonance condition, the St Paul's story, the optical resonators and Rayleigh's 1910 paper. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936486232167,"sku":"13786268199407993578","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936486264935,"sku":"23119460562640614802","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936486297703,"sku":"17945424401452203692","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936486330471,"sku":"24452345147380519842","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936486363239,"sku":"20462324246144679728","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936486396007,"sku":"11014482123294029617","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936486428775,"sku":"38608135989282502325","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936486461543,"sku":"31172249703651916330","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936486494311,"sku":"25744990581455305057","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936486527079,"sku":"10182690828599618591","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936486559847,"sku":"30318292214194300466","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936486592615,"sku":"32891805840070090207","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936486625383,"sku":"24394194928591562470","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936486658151,"sku":"19662125091767541925","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936486690919,"sku":"28056350516123063254","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936486723687,"sku":"24863663143670896430","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/whispering-gallery_front_02_white.png?v=1793595342"},{"product_id":"erasa-forgetting-costs-heat-physics-t-shirt","title":"Erasa – Forgetting Costs Heat Physics T-Shirt","description":"\u003cp\u003eErasa wipes a bit clean and a puff of heat drifts off. Forgetting is never free.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eErasing one bit of information, resetting a memory to a standard state no matter what it held, must on average release at least k_B T ln 2 of heat into the surroundings. At 300 K that is 2.87 × 10⁻²¹ J, about 0.018 eV. The cost comes from erasure; it does not apply to every logical step.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e⟨Q⟩ ≥ k_B T ln 2\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eQ: heat released per erased bit (J)\u003c\/li\u003e\n\u003cli\u003ek_B: Boltzmann constant, 1.380649 × 10⁻²³ J\/K\u003c\/li\u003e\n\u003cli\u003eT: temperature (K)\u003c\/li\u003e\n\u003cli\u003eln 2: ≈ 0.693 (dimensionless)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eRolf Landauer proposed it in 1961, and Bérut et al. measured it with a single trapped colloidal bead (Nature, 2012).\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e It applies to logically irreversible erasure, not to every computation.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Erasa, the pixel-art character, with the title. Back: the Landauer bound, its value at 300 K and the 1961 and 2012 sources. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936494948455,"sku":"83172230646913094383","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936494981223,"sku":"12935968685006098636","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936495013991,"sku":"67054506673148784362","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936495046759,"sku":"15835748932219440946","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936495079527,"sku":"24803846728901469585","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936495112295,"sku":"10925534457341228532","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936495145063,"sku":"30702337848225688868","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936495177831,"sku":"16796717017677971861","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936495210599,"sku":"29612579883535369727","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936495243367,"sku":"30233231273979512045","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936495276135,"sku":"11521486384717058922","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936495308903,"sku":"22491118002802289328","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936495341671,"sku":"17456635871522125706","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936495374439,"sku":"26443990823853313283","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936495407207,"sku":"13323625298108891061","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936495439975,"sku":"85400734677753941233","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/landauer-limit_front_01_white.png?v=1793595361"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/collections\/Pixelated_Physics_-_Physics_T-Shirts_Home_Page_Banner._47178fa7-1c59-43fd-a573-3c74a0e1a099.png?v=1793678019","url":"https:\/\/pixelatedphysics.com\/it\/collections\/pixelated-physics-tees-science-you-can-wear.oembed","provider":"Pixelated Physics","version":"1.0","type":"link"}