Reference Terms
from Wikipedia, the free encyclopedia

Infrared

Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwave radiation.

The name means "below red", red being the color of visible light of longest wavelength.

Note:   The above text is excerpted from the Wikipedia article "Infrared", which has been released under the GNU Free Documentation License.
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May 23, 2015

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