Term:Infrared

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NIST SP 800-121

Infrared (IR) - An invisible band of radiation at the lower end of the electromagnetic spectrum. It starts at the middle of the microwave spectrum and extends to the beginning of visible light. Infrared transmission requires an unobstructed line of sight between transmitter and receiver.

NIST SP 800-48

Infrared (IR) - An invisible band of radiation at the lower end of the electromagnetic spectrum. It starts at the middle of the microwave spectrum and extends to the beginning of visible light. Infrared transmission requires an unobstructed line of sight between transmitter and receiver. It is used for wireless transmission between computer devices, as well as for most handheld remotes for TVs, video, and stereo equipment.