The discovery of infrared radiation.

definition

Infrared radiation a type of electromagnetic radiation. It is generally invisible to the human eye.

DISCOVERY

In 1800, the German-British astronomer Friedrich Wilhelm Herschel discovered infrared radiation when he placed a thermometer just beyond the red part of a sunlight spectrum and found out that that region had a higher temperature than the coloured parts of the spectrum.

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discoverer

Here is a painting of Frederick Wilhelm Herschel:

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(1738-1822)

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