infrared radiation

Scientists divide the IR spectrum into three regions. Thewavelengths are specified in microns (symbolized µ, where 1 µ = 10^-6 meter)or in nanometers (abbreviated nm, where 1 nm = 10^-9 meter = 0.001 µ). The near IR band contains energy in the range of wavelengths closest to thevisible, from approximately 0.750 to 1.300 µ (750 to 1300 nm). The intermediateIR band (also called the middle IR band) consists of energy in the range1.300 to 3.000 µ (1300 to 3000 nm). The far IR band extends from 2.000 to14.000 µ (3000 nm to 1.4000 x 10⁴ nm).

Infrared is used in a variety of wirelesscommunications, monitoring, and control applications. A few of the applications include home-entertainment remote-control boxes, wireless local area networks, links between notebook computers and desktop computers, cordless modems, intrusion detectors, motion detectors, and fire sensors

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