near-infrared radiation


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near-infrared radiation

[′nir ‚in·frə′red ‚rād·ē′ā·shən]
(electromagnetism)
Infrared radiation having a relatively short wavelength, between 0.75 and about 2.5 micrometers (some scientists place the upper limit from 1.5 to 3 micrometers), at which radiation can be detected by photoelectric cells, and which corresponds in frequency range to the lower electronic energy levels of molecules and semiconductors. Also known as photoelectric infrared radiation.
References in periodicals archive ?
Scattering has been a limiting factor in the use of light and near-infrared radiation to image the body.
The team demonstrated a flexible electrochromic device, which means a small electric charge (about 4 volts) can lighten or darken the material and control the transmission of heat-producing, near-infrared radiation.
The tubes, when non-invasively exposed to laser-generated near-infrared radiation, respond by vibrating, creating heat.
Because of its large size, the camera can detect near-infrared radiation from a given region of the sky more than 50 times faster than the detector that McMahon and Hu used at Keck I.
When longer wavelengths of visible light and near-infrared radiation pass into the eye, they are absorbed by the dark pigment epithelium below the retina.