Black Body
An idealized body that is a perfect radiator and perfect absorber of electromagnetic radiation. A black body not only absorbs all wavelengths of energy and radiates at all wavelengths, but it does this at the maximum possible intensity for any given temperature. Black bodies do not have to be black. A star is a good approximation to a black body since stellar gases are very good absorbers of energy. Black body radiation is radiation emitted by a black body.
 
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Development Notes
Text by M. Alan Kazlev

Initially published on 08 October 2001.