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What is IR?
IR refers to INFRARED.
Radiant energy in the wavelength range of about 770 to 1100 nanometers (nm).
Energy in this range is not visible to the naked eye, but can be sensed by the skin.
Applications include heat lamps, photography, medical therapy, and industry.
references for this page: INFRARED, IR
references to this page: /IR, COLOR RENDERING INDEX, DICHROIC MIRROR, HOURS