infrared

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Related to Infra-red light: infrared lamp, ultraviolet light

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.

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)

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.
References in periodicals archive ?
And if it's relaxation you are looking for there is the stress buster machine, which gently massages your feet while bathing them in infra-red light to, apparently, increase oxygen intake and help lymphatic drainage.
A camera and infra-red light source mounted under the bridge begins to track an aircraft's approach when it comes into range, about 25 metres from the gate.
These units can be used over a temperature range from -20[degrees] and +90[degrees]C and can be used for translucent liquids that are capable of transmitting infra-red light.
Infra-red light was effective in making plants grow stemmy and tall, while red caused shorter stems and bigger roots.
The scientists, who published their findings in the (http://nature.com/articles/doi:10.1038/nature18940) Nature  science journal, measured the non-visible, infra-red light the gaseous planet emits in order to gauge the temperature of the upper atmosphere 500 miles higher than the planet's rim.
"Other systems work using a measuring grid of infra-red light," explains Torsten Sattler, another postdoc in Pollefeys' group who is also participating in the project.
The equipment is held over the skin and uses near infra-red light which is absorbed by the haemoglobin in the blood, which then detects where it has been absorbed and projects a real-time image of a "road map" of the veins back on to the skin.
The infra-red light looks for alcohol in the finger's tissue.
Ultraslim is a non-invasive technology consisting of infra-red light (IR), radio frequency and endermology.
Scientists produced the picture by combining infra-red light images from two telescopes in the northern and southern hemispheres.
The film detects infra-red light that is invisible to the human eye, but which is reflected back from healthy green plants.