infrared(redirected from Infra red)
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adj. Abbr. IR
1. Of or relating to electromagnetic radiation between microwaves and red visible light in the electromagnetic spectrum, having frequencies between 300 gigahertz and 400 terahertz and wavelengths between 1 millimeter and 750 nanometers.
2. Generating, using, or sensitive to infrared radiation.
Infrared light or the infrared part of the spectrum.
(General Physics) the part of the electromagnetic spectrum with a longer wavelength than light but a shorter wavelength than radio waves; radiation with wavelength between 0.8 micrometres and 1 millimetre
(General Physics) of, relating to, using, or consisting of radiation lying within the infrared: infrared radiation.
1. the part of the invisible spectrum that is contiguous to the red end of the visible spectrum and that comprises electromagnetic radiation of wavelengths from 800 nm to 1 mm.adj.
2. of, pertaining to, or using the infrared or its component rays: infrared radiation. Compare ultraviolet.
Relating to the invisible part of the electromagnetic spectrum with wavelengths longer than those of visible red light but shorter than those of microwaves. See more at electromagnetic spectrum.
Did You Know? In 1800 the astronomer Sir William Herschel discovered infrared light when he was exploring the relationship between heat and light. Herschel used a prism to split a beam of sunlight into a rainbow of colors (red, orange, yellow, green, blue, indigo, and violet) and measured how hot a thermometer got when it was placed in each of the various bands. Then he tried placing the thermometer just outside the red band, where there was no visible color at all. The thermometer heated up, just as if light were shining on it. Further experiments showed that this invisible form of light behaved just like visible light in many ways; for example, it could be reflected by a mirror. We now call this form of light infrared light. Another kind of invisible light, ultraviolet light, is found just beyond the violet end of the spectrum.
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|Noun||1.||infrared - the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; "they could sense radiation in the infrared"|
infrared spectrum - the spectrum of infrared radiation
|2.||infrared - electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves|
|Adj.||1.||infrared - having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end; "infrared radiation"; "infrared photography"|
infrared[ˈɪnfrəˈred] ADJ [rays, light] → infrarrojo
adj → infrarot
1. adj → infrarosso/a
2. n (raggio) → infrarosso