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thermal radiation
(redirected from Heat radiation)

   Also found in: Wikipedia 0.26 sec.

thermal radiation

Process 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.


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A reflection tube around the heated flow-tube assembly minimizes heat radiation to the mold.
Various conditions in the cooling system - external clogging of the radiator by dirt, cotton, straw; internal clogging of narrow radiator passages; low coolant level resulting from leakage; a worn-out motor - any or all of these will cause more heat radiation and lower efficiency.
b) The XFP-E MSA, agreed in March 2006, provides not only miniaturized transceivers with an effective heat radiation method, but also allows modules to be exchanged without cutting the electric current.
 
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