{"product_id":"fizeaus-moving-water-plate-026-physics-poster","title":"Fizeau's Moving Water – Plate 026 Physics Poster","description":"\u003cp\u003ePlate 26 speaks for itself: \u003cem\u003e“Water drags light, but only 44%.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eFizeau timed light sent with and against water flowing in tubes. The water dragged the light, but only by Fresnel's partial-drag fraction, a result special relativity later explained as velocity addition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eu ≈ c\/n + v (1 − 1\/n²)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eu: speed of light in the moving water (lab frame), m s⁻¹\u003c\/li\u003e\n\u003cli\u003ec: speed of light in vacuum, m s⁻¹\u003c\/li\u003e\n\u003cli\u003en: refractive index of water, dimensionless\u003c\/li\u003e\n\u003cli\u003ev: water speed, m s⁻¹\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eParis, 1851: about half of full drag. For n = 1.333, 1 − 1\/n² ≈ 0.44.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eH. Fizeau, C. R. Acad. Sci. 33, 349 (1851).\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 026, “Fizeau's Moving Water”: the pixel-art plate with its slogan “Water drags light, but only 44%.”, 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":50961868914791,"sku":"28596410197319425222","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50961868947559,"sku":"87278699472471105458","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50961868980327,"sku":"24514696243321797282","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50961869013095,"sku":"17348884404915205033","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50961869045863,"sku":"28295680178344208859","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50961869078631,"sku":"25130627529113674596","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50961869111399,"sku":"31054544339717197176","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50961869144167,"sku":"14940056706462990487","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50961869176935,"sku":"17378399255587113203","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/18147437841650947943_2048.jpg?v=1793633428","url":"https:\/\/pixelatedphysics.com\/products\/fizeaus-moving-water-plate-026-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}