{"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","url":"https:\/\/pixelatedphysics.com\/tr\/products\/murmura-the-whispering-gallery-physics-t-shirt","provider":"Pixelated Physics","version":"1.0","type":"link"}