infrared

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infrared

 [in″frah-red´]
denoting electromagnetic radiation of wavelength greater than that of the red end of the spectrum, i.e., of 0.75–1000 μm. Infrared rays are sometimes subdivided into long-wave or far infrared (about 3.0–1000 μm) and short-wave or near infrared (about 0.75–3.0 μm). They are capable of penetrating body tissues to a depth of 1 cm. Sources of infrared rays include heat lamps, hot water bottles, steam radiators, and incandescent light bulbs. Infrared rays are used therapeutically to promote muscle relaxation, to speed up the inflammatory process, and to increase circulation to a part of the body. See also heat.

in·fra·red (IR, ir),

(in-fră-red'),
That portion of the electromagnetic spectrum with wavelengths between 730 and 1000 nm.

infrared

/in·fra·red/ (-red´) denoting electromagnetic radiation of wavelength greater than that of the red end of the spectrum, having wavelengths of 0.75–1000 μm; sometimes subdivided into long-wave or far i. (about 3.0–1000 μm) and short-wave or near i. (about 0.75–3.0 μm).

in·fra·red

(in'fră-red)
That portion of the electromagnetic spectrum with wavelengths between 770-1000 nm.

infrared

the electromagnetic radiation in the region between red light and radio waves. see ELECTROMAGNETIC SPECTRUM.

infrared (IR) (inˑ·fr·redˈ),

n electromagnetic radiation of longer wavelength than red light in the range of 730 nanometres (nm) to about 1 millimetre (mm).

infrared (IR)

Radiant energy of wavelengths between the extreme red wavelengths of the visible spectrum and a wavelength of a few millimetres. The wave band comprising radiations between 780 and 1400 nm is referred to as IR-A. Excessive exposure to these radiations can cause visual loss (e.g. eclipse blindness) and cataract. The waveband comprising radiations between 1400 and 3000 nm is referred to as IR-B. Excessive exposure to these radiations can cause cataract and corneal opacity. The wave band comprising radiations between 3000 and 1 ✕ 106 nm (or 1 mm) is referred to as IR-C. Excessive exposure to these radiations can cause cataract (heat-ray cataract). See eclipse blindness; absorptive lens; infrared optometer.

infrared

denoting electromagnetic radiation of wavelength greater than that of the red end of the spectrum, having wavelengths of 0.75-1000 μm. Infrared rays are sometimes subdivided into long-wave or far infrared (about 3.0-1000 μm) and short-wave or near infrared (about 0.75-3.0 μm). They are capable of penetrating body tissues to a depth of 10 mm. Sources of infrared rays include heat lamps, hot water bottles, steam radiators and incandescent light bulbs.
Infrared rays are used therapeutically to promote muscle relaxation, to speed up the inflammatory process, and to increase circulation to a part of the body. See also heat.
References in periodicals archive ?
Useful characterization of the anisotropy and mass distribution for synthetic polymeric material can be obtained through far-infrared transmission measurements.
In order to make such sensitive far-infrared observations, the detectors of the three science instruments - two cameras/imaging spectrometers and a very high-resolution spectrometer - must be cooled to a frigid -271C, close to absolute zero.
While there, he authored research papers in numerous scientific journals in the fields of quantum electronics, optoelectronics, and far-infrared astronomy.
The far-infrared High-resolution Airborne Wideband Camera-plus (HAWC+) will be added to SOFIAs suite of seven cameras, spectrometers, and high-speed photometers during the latter part of Cycle 4.
Herschel is considerably larger than NASA's Hubble, and operates at far-infrared wavelengths.
Speaking of far-infrared and millimeter waves: What's about to be the world's most powerful imaging telescope of any kind?
The expansion of the universe shifts the far-infrared radiation from distant galaxies to longer, submillimeter wavelengths.
The total channel sensor measures all radiation from near- ultraviolet to far-infrared.
The new system will have extended capabilities to perform far-infrared spectroscopy studies and will complement other infrastructure at the department.
New images taken with the Herschel space observatory with unprecedented resolution at far-infrared wavelengths show that the giant black scar of obscuring dust crossing the centre of Centaurus A all but disappears.
By observing at the longer mid- and far-infrared wavelengths, astronomers can observe the feebler glows of objects at room temperature and even down within striking distance of absolute zero.