{"product_id":"the-sodium-doublet-plate-045-physics-poster","title":"The Sodium Doublet – Plate 045 Physics Poster","description":"\u003cp\u003ePlate 45 speaks for itself: \u003cem\u003e“Two yellows.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eSodium's yellow light is two close lines. Spin–orbit coupling splits the 3p level into 3p₃\/₂ and 3p₁\/₂, and the two drops to 3s give the D₂ and D₁ lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eΔE = hc (1\/λ₂ − 1\/λ₁)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eΔE: fine-structure splitting, J\u003c\/li\u003e\n\u003cli\u003eh: Planck constant, J s\u003c\/li\u003e\n\u003cli\u003ec: speed of light, m s⁻¹\u003c\/li\u003e\n\u003cli\u003eλ₁, λ₂: D₁ and D₂ wavelengths, m\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eD₂ 588.995 nm, D₁ 589.592 nm (air). Two levels: 3p₃\/₂ and 3p₁\/₂. Splitting ≈ 2.1 meV.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNIST Atomic Spectra Database (Na I).\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 045, “The Sodium Doublet”: the pixel-art plate with its slogan “Two yellows.”, 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":50962079154279,"sku":"17931206131782225594","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50962079187047,"sku":"32066446356476248762","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50962079219815,"sku":"10089314262866519140","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50962079252583,"sku":"17058285609038822432","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50962079285351,"sku":"12121775725902471479","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50962079318119,"sku":"35585610889056293550","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50962079350887,"sku":"19640623313598675148","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50962079383655,"sku":"16322867835714373696","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50962079416423,"sku":"27454651392952963698","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/14350965805737505487_2048.jpg?v=1793634613","url":"https:\/\/pixelatedphysics.com\/id\/products\/the-sodium-doublet-plate-045-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}