define black body and gray body
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Black Body: a black body is an object that absorbs all the radiant energy reaching its surface from all the direction with all the with all the wavelengths. ... Gray body: A gray body is defined as a body whose absorptivity of a surface does not vary with variation in temperature and wavelength of the incident radiation.
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Black Body: a black body is an object that absorbs all the radiant energy reaching its surface from all the direction with all the with all the wavelengths. ... Gray body: A gray body is defined as a body whose absorptivity of a surface does not vary with variation in temperature and wavelength of the incident radiation.
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