Infrared radiation

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Infrared radiation consists of light whose wavelength is longer than the red colour in the visible part of the spectrum, but shorter than microwave radiation. Infrared radiation can be perceived as heat. The earth’s surface, the atmosphere and clouds all emit infrared radiation, which is also known as terrestrial or long-wave radiation. In contrast, solar radiation is mainly short-wave radiation because of the temperature of the Sun.

See: radiation, greenhouse effect, enhanced greenhouse effect, global warming.

Links

NASA science: Infrared Waves