{"product_id":"braggs-law-salt-planes-plate-056-physics-poster","title":"Bragg's Law: Salt Planes – Plate 056 Physics Poster","description":"\u003cp\u003ePlate 56 speaks for itself: \u003cem\u003e“Read the angles.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eX-rays reflect strongly from crystal planes when waves from neighbouring planes arrive in step. Measuring the angles of those reflections from rock salt gave the first crystal structure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003en λ = 2 d sin θ\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003en: order, integer\u003c\/li\u003e\n\u003cli\u003eλ: X-ray wavelength, m\u003c\/li\u003e\n\u003cli\u003ed: plane spacing, m\u003c\/li\u003e\n\u003cli\u003eθ: glancing angle, °\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eRock salt is cubic, a = 564.02 pm. (200) is the strongest reflection.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eW. L. Bragg, Proc. Camb. Phil. Soc. 17, 43 (1913).\u003c\/li\u003e\n\u003cli\u003eW. H. Bragg, W. L. Bragg, Proc. R. Soc. A 88, 428 (1913).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 056, “Bragg's Law: Salt Planes”: the pixel-art plate with its slogan “Read the angles.”, 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":50962533810279,"sku":"29069557056017238648","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50962533843047,"sku":"28408080251381754501","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50962533875815,"sku":"29750510529009380491","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50962533908583,"sku":"19227200071125767847","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50962533941351,"sku":"17268181209023366560","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50962533974119,"sku":"23213210382370618295","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50962534006887,"sku":"34523597467229754603","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50962534039655,"sku":"26085154606580059797","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50962534072423,"sku":"21806215520126201120","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/4624116530036378602_2048.jpg?v=1793634864","url":"https:\/\/pixelatedphysics.com\/ja\/products\/braggs-law-salt-planes-plate-056-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}