what is Infrared radiation
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Infrared radiation is electromagnetic radiation with longer wavelengths than those of visible light, and is therefore invisible to the human eye. It is sometimes called infrared light.
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Infrared radiation (IR) sometimes known as infrared light , is electromagnetic radiation (EMR) with wavelengths longer than those of visible lights . hence , it is undetectable by human eye .
According to NASA , infrared light was discovered by British Astronomer William Herschel in 1800 .
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