(IR) infrared. Electromagnetic radiation with wavelength longer than visible light but shorter than that of microwaves. Infrared radiation is produced by hot objects; absorption of infrared radiation causes chemical bonds to vibrate.
The heat energy that is emitted from all solids, liquids, and gases. In the context of the greenhouse issue, the term refers to the heat energy emitted by the Earth's surface and its atmosphere. Greenhouse gases strongly absorb this radiation in the Earth's atmosphere, and radiate some back towards the surface, creating the greenhouse effect. See radiation, greenhouse effect, enhanced greenhouse effect, global warming.
Electromagnetic energy with wavelengths of .8 to 5 microns. These rays are not visible to the human eye, but infrared radiation reflected off objects can be recorded as an image on special camera film or by digital instruments. Infrared reflectance data is very useful for detecting the health of vegetation. See Also: electromagnetic energy, micron
Radiation with wavelengths greater than those of the visible light (at about 8000 Angstroms or 800 nanometers(nm)) but shorter than those of microwaves (at about 1,000,000 Angstroms or 800,000 nm). Infrared radiation is associated with heat energy.
Electromagnetic energy in the wavelength range of 0.7 to 200 mm. They are invisible rays just beyond the red of the visible light spectrum. Infrared wavelength is longer than visible light but shorter than radio waves.
Electromagnetic waves whose frequencies range from the microwave region to the red end of the visible spectrum. Infrared radiation is measured by the amount of heat given off by an object-in essence, the hotter an object, the more infrared radiation is emitted.
Radiation with wavelengths too long to be perceived by the human eye (that is, longer than 0.77 microns) and less than 1,000 microns. Room IR is infrared radiation in the 7.7-8.0 micron region and typical of that radiated from surfaces near room temperature.
Radiation emitted by the Earthâ€™s surface, the atmosphere, and clouds. It is also known as terrestrial or long-wave radiation. Infrared radiation has a distinctive range of wavelengths (â€œspectrumâ€) longer than the wavelength of the red color in the visible part of the spectrum. In lay term also called heat radiation. Back up
Long wavelength rays, sometimes called "heat waves". Half of the sun's energy is infrared, IR is stronger at high altitudes. Electric heaters, house radiators, and ordinary light bulbs also emit infrared energy. The rays cause the skin to feel hot and may contribute to the discomfort caused by exposure to bright light.
Electromagnetic radiation lying in the wavelength interval from 0.7 5m to 1000 5m (micrometers). Its lower limit is bounded by visible radiation, and its upper limit by microwave radiation. Most of the energy emitted by the Earth and its atmosphere is at infrared wavelengths. Infrared radiation is generated almost entirely by large-scale intramolecular processes. The tri-atomic gases, such as water vapor, carbon dioxide, and ozone, absorb infrared radiation and play important roles in the propagation of infrared radiation in the atmosphere. Source: EPO.
Electromagnetic radiation whose wavelengths lie in the range from 0.75 micrometer to 1000 micrometers; invisible long wavelength radiation (heat) capable of producing a thermal or photovoltaic effect, though less effective than visible light.
Energy in the 0.7â€“100 micrometres (microns) area of the electromagnetic spectrum. â€œInvisible lightâ€, longer than visible light, is known as the near infrared. This can be recorded on photosensitive materials. Far infrared radiation is often termed â€œthermal infraredâ€ and must be recorded by electronic means.
Electromagnetic radiation lying in the wavelength interval between 0.8 micron and 1 millimeter. At the lower limit of this interval, the infrared radiation spectrum is bounded by visible radiation, while on its upper limit it is bounded by microwave radiation.
electromagnetic radiation of wavelengths between approximately 0.75 and 1000 millimeters; see also atmospheric radiation, terrestrial radiation, longwave radiation. Russian translation prepared by Nina A. Zaitseva for the Arctic Climatology Project Arctic Meteorology and Climate Atlas.
That portion of the electromagnetic spectrum lying between visible light and microwaves. The wavelength range is approximately between 720 and 1 mm. In meteorology, this range is often further divided into the solar infrared and terrestrial radiation, with the division occurring around 4 Î¼m. Dominant absorbers of infrared radiation include the earth's surface, clouds, water vapor, and carbon dioxide. By Kirchhoff's law, these are also good emitters of infrared radiation.
A wavelength, or frequency, of light that is slightly less energetic than visible light, but more energetic than radio or microwave radiation. Infrared radiation ranges in wavelength between 10^-6 to 10^-4 meters and in frequency between 10^12 and 10^14 Hz. Infrared radiation is not strong enough to ionize atoms.