Sunday, February 28th, 2010
Infrared radiation (IR) is electromagnetic radiation with a wavelength between 0.7 and 300 micrometers. Its wavelength is longer (and the frequency lower) than that of visible light.
British astronomer Sir Frederick William Herschel discovered infrared radiation around the year 1800. He used a glass prism to create a spectrum (the “rainbow” created when light is divided [...]