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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
/ fär′ĭn′frə-rĕd′ /
- 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
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