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thermal radiation |
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thermal radiationProcess by which energy is emitted by a warm surface. The energy is electromagnetic radiation and so travels at the speed of light and does not require a medium to carry it. Thermal radiation ranges in frequency from infrared rays through visible light to ultraviolet rays. The intensity and frequency distribution of the emitted rays are determined by the nature and temperature of the emitting surface; in general, the hotter the object, the shorter the wavelength. A hotter object is a better emitter than a cooler one, and a blackened surface is a better emitter than a silvered one. An example of thermal radiation is the heating of the Earth by the Sun. thermal radiation [′thər·məl ‚rād·ē′ā·shən] (thermodynamics) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The other horn of the dilemna was to suppose that something other than a thermal radiator was contributing and thereby complicating the cosmological evidence. The four technology demonstrations include a large flexible solar array, a 40-meter deployable boom, high radiation environment electronics and a thermal radiator experiment. The radiator beam is attached to the truss via a rotating mechanism called the thermal radiator rotary joint (TRRJ) that rotates the three radiators 105 degrees in either direction. |
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