{"product_id":"hydrogen-1s-2s-plate-043-physics-poster","title":"Hydrogen 1S–2S – Plate 043 Physics Poster","description":"\u003cp\u003ePlate 43 speaks for itself: \u003cem\u003e“Fourteen sure digits from one hydrogen jump.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eThe 1S–2S transition in hydrogen is driven by two photons of 243 nm and has a very narrow line. Its frequency is among the most precisely measured in physics and tests QED and the proton radius.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eλ = 2c \/ f = 243.13 nm\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eλ: wavelength of each of the two exciting photons, m\u003c\/li\u003e\n\u003cli\u003ec: speed of light, m s⁻¹\u003c\/li\u003e\n\u003cli\u003ef: 1S–2S frequency 2 466 061 413 187 035(10) Hz, Hz\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFractional uncertainty 4.2×10⁻¹⁵. Parthey et al., PRL 107, 203001 (2011).\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e A 2013 re-measurement gave 2 466 061 413 187 018(11) Hz, agreeing within errors.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eC. G. Parthey et al., Phys. Rev. Lett. 107, 203001 (2011).\u003c\/li\u003e\n\u003cli\u003eA. Matveev et al., Phys. Rev. Lett. 110, 230801 (2013).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 043, “Hydrogen 1S–2S”: the pixel-art plate with its slogan “Fourteen sure digits from one hydrogen jump.”, the key equation and the facts panel shown above. Pixelated Physics. Physics. Personified.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"9'' x 12\" (Vertical) \/ Matte","offer_id":50961963778151,"sku":"22358849476117760656","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50961963810919,"sku":"50506215652555635305","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50961963843687,"sku":"22851936865270210382","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50961963876455,"sku":"28486619623194664060","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50961963909223,"sku":"22478816010883511207","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50961963941991,"sku":"10182868210948852795","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50961963974759,"sku":"31976649261769029348","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50961964007527,"sku":"19715412292321547561","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50961964040295,"sku":"28819172170147079109","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/12244190402815362645_2048.jpg?v=1793634542","url":"https:\/\/pixelatedphysics.com\/sv\/products\/hydrogen-1s-2s-plate-043-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}