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far-infrared radiation
[fahr-in-fruh-red]
noun
the longer wavelengths of electromagnetic radiation in the infrared region of the spectrum, beyond the red end of the visible spectrum, from 50 to 1000 micrometers. FIR
far-infrared radiation
Infrared electromagnetic radiation of very long wavelengths, in the range of 2–50 microns. It is used in medicine to provide a penetrating heat to the body.
Also called far-red radiation
Example Sentences
The Forum mission will carry a spectrometer to sense the far-infrared radiation coming up off the Earth.
"If extraterrestrial intelligent beings exist and have reached a high level of technical development, one by-product of their energy metabolism is likely to be the large-scale conversion of starlight into far-infrared radiation. It is proposed that a search for sources of infrared radiation should accompany the recently initiated search for interstellar radio communications."
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