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The Nature of Light In Astronomy. Herschel's Infrared experiment Invisible (to our eyes) light immediately beyond the color red is call infrared light. - ppt download
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Behind the Lines: Herschel's Discovery of Infra-Red
Herschel discovers infrared light, 1800 - Stock Image - H408/0384 - Science Photo Library
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In 1800 astronomer William Herschel, out of curiosity, used a prism and placed a thermometer on each color of the spectrum to see if there was a difference. He had an extra
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