infrared (ir) radiation
31infrared radiation — noun electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves (Freq. 1) • Syn: ↑infrared, ↑infrared light, ↑infrared emission • Hypernyms: ↑actinic radiation, ↑actinic ray * * * …
32Infrared photography — Top: tree photographed in the near infrared range. Bottom: same tree in the visible part of the spectrum …
33Infrared Astronomical Satellite — ▪ astronomy U.S. U.K. Netherlands satellite launched in 1983 that was the first space observatory to map the entire sky at infrared wavelengths. After a series of brief studies by infrared instruments carried on sounding rockets had… …
34infrared — That portion of the electromagnetic spectrum with wavelengths between 730 and 1000 nm. * * * in·fra·red .in frə red adj 1) lying outside the visible spectrum at its red end used of radiation having a wavelength between about 700 nanometers and 1… …
35infrared spectrophotometry — (IR) An analytical technique which utilizes an instrument which passes infrared radiation through a sample or which bounces infrared radiation off the surface of a sample. A very sensitive heat detecting device measures the amount of infrared… …
36infrared — adjective Date: 1881 1. situated outside the visible spectrum at its red end used of radiation having a wavelength between about 700 nanometers and 1 millimeter 2. relating to, producing, or employing infrared radiation < infrared therapy > 3.… …
37radiation therapy — radiotherapy. * * * or radiotherapy or therapeutic radiology Use of radiation sources to treat or relieve diseases, usually cancer (including leukemia). The ionizing radiation primarily used to destroy diseased cells works best on fast growing… …
38infrared radiation — the band of electromagnetic radiation that is longer in wavelength than the red of the visible spectrum. Infrared radiation is responsible for the transmission of radiant heat. It may be used in physiotherapy to warm tissues, reduce pain, and… …
39infrared astronomy — the study of infrared radiation emitted by celestial objects. [1960 65] * * * infrared astronomy noun The study of radiation from celestial bodies, such as nascent stars, in the infrared wavelength range • • • Main Entry: ↑infrared * * * infrared …
40infrared emission — noun electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves (Freq. 4) • Syn: ↑infrared, ↑infrared light, ↑infrared radiation • Hypernyms: ↑actinic radiation, ↑actinic ray …
