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There exists a mechanism for regulating thermal radiant energy referred to as ¡®cold reflection¡¯. Thermal radiation is defined as radiant energy emitted by a medium by virtue of its temperature. The emission of thermal radiation is governed by the temperature of the emitting body (i.e. heated silicon rod ( 32 )). When radiant energy impacts a surface medium, this energy can be either reflected by the medium, absorbed by the medium, or transmitted through the medium. If the incident medium is highly polished, radiation is primarily reflected. In pure reflection, the impacted medium does not absorb radiation, and therefore the medium temperature does not change. This is a ¡°cold reflector¡±. In the case of this ¡°cold reflector¡± the reflected radiation is not thermal radiant energy.

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sltmac(½ð±Ò+1): 2011-10-11 11:10:29
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