{"product_id":"infrara-herschel-infrared","title":"Infrara – Herschel Discovers Infrared \/ Beyond Red Physics Sticker","description":"\u003cp\u003eInfrara, a powdered-wig astronomer, splits sunlight with a prism and sets a thermometer beside the spectrum.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eIn 1800 William Herschel placed thermometers in the colours of a prism spectrum and found the temperature rose from violet to red. Then he moved one past the red end, where no light could be seen, and it rose further still (“Experiments on the Refrangibility of the Invisible Rays of the Sun”, Phil. Trans. R. Soc. 90, 284). The Sun emits invisible rays beyond the red: infrared.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eλ\u003csub\u003eIR\u003c\/sub\u003e \u0026gt; λ\u003csub\u003ered\u003c\/sub\u003e ≈ 0.7 µm\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eλ\u003csub\u003eIR\u003c\/sub\u003e: infrared wavelengths, about 0.7 µm to 1 mm\u003c\/li\u003e\n\u003cli\u003eλ\u003csub\u003ered\u003c\/sub\u003e: long-wavelength end of the visible spectrum\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt was the first time anyone showed there is light we cannot see. Ultraviolet beyond the violet was found by Ritter the next year.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The heat peak beyond red came partly from his glass prism's dispersion; with a grating the solar spectrum peaks in the visible.\u003c\/p\u003e\u003ch3\u003eOn the sticker\u003c\/h3\u003e\u003cp\u003eInfrara holds a prism that fans light into a rainbow, with a thermometer standing at the side, past the coloured band. Printed text: \u003cstrong\u003eINFRARA\u003c\/strong\u003e with the line \u003cstrong\u003eBEYOND RED\u003c\/strong\u003e. Pixel-art kiss-cut vinyl sticker, white, in 2″, 3″, 4″ and 6″ sizes.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"2\" × 2\" \/ White","offer_id":50964077871207,"sku":"14608422169552696788","price":4.99,"currency_code":"USD","in_stock":true},{"title":"3\" × 3\" \/ White","offer_id":50964077903975,"sku":"10538178080442757936","price":6.99,"currency_code":"USD","in_stock":true},{"title":"4\" × 4\" \/ White","offer_id":50964077936743,"sku":"17433105899757002816","price":8.99,"currency_code":"USD","in_stock":true},{"title":"6\" × 6\" \/ White","offer_id":50964077969511,"sku":"16910282790532416070","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/16251396251867586743_1200.jpg?v=1793659818","url":"https:\/\/pixelatedphysics.com\/tr\/products\/infrara-herschel-infrared","provider":"Pixelated Physics","version":"1.0","type":"link"}