{"product_id":"aurora-line-by-line-plate-077-physics-poster","title":"Aurora, Line by Line – Plate 077 Physics Poster","description":"\u003cp\u003ePlate 77 speaks for itself: \u003cem\u003e“Green is oxygen at 557.7. Red is oxygen higher up.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eAuroral colours are atomic lines. Oxygen's green 557.7 nm line dominates lower down; its red 630.0 nm line comes from a long-lived state that survives only where collisions are rare, higher up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eλ = h c \/ ΔE\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eλ: wavelength, m\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\u003eΔE: transition energy, J\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eGreen: O I 557.7 nm, ~100–200 km. Red: O I 630.0 nm, peaking ≈ 220–300 km.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eA. Vallance Jones, Aurora (1974).\u003c\/li\u003e\n\u003cli\u003eNIST Atomic Spectra Database (O I).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 077, “Aurora, Line by Line”: the pixel-art plate with its slogan “Green is oxygen at 557.7. Red is oxygen higher up.”, 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":50962675794023,"sku":"28741646041267950023","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50962675826791,"sku":"11812997109376536448","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50962675859559,"sku":"27065957400168255843","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50962675892327,"sku":"28616923909100253346","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50962675925095,"sku":"26843202084359571321","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50962675957863,"sku":"30990189114189004594","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50962675990631,"sku":"40974065141765559612","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50962676023399,"sku":"10263440812533530599","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50962676056167,"sku":"11873063747526027895","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/68523191980228843_2048.jpg?v=1793636552","url":"https:\/\/pixelatedphysics.com\/it\/products\/aurora-line-by-line-plate-077-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}