The absorption coefficient value of a perfect | vedclass

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(D) perfect black body is defined as an ideal body that absorbs all the incident radiation falling on it,regardless of the frequency or angle of incid

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$1$

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(D) perfect black body is defined as an ideal body that absorbs all the incident radiation falling on it,regardless of the frequency or angle of incidence.By definition,the absorption coefficient $\alpha$ is the ratio of the energy absorbed to the total energy incident on the body.Since a perfect black body absorbs all incident radiation,the energy absorbed equals the total incident energy.Therefore,the absorption coefficient $\alpha = 1$.

The absorption coefficient value of a perfect black body is

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