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#1
12-03-2005, 07:21 PM
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Only when one takes additional physics classes does one learn that the
absorption and emission depend on the wavelength of the light. In the visible spectrum, black objects absorb light well, but white objects do not absorb light well. That is not true at other wavelengths. The wavelength corresponding to hot (but not glowing) radiators is far into the infrared, with a wavelength of perhaps 5 micrometers. At this wavelength, all paint colors, including white, are "black" and emit and absorb heat well. |
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