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Assertion : Coefficient of absorption of radiation of an ideal black body is `1`. Reason : An ideal black body emits radiation of all wavelengths.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If the assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.

Answer» Correct Answer - B
We know that for ideal black body reflectance `(r) =0` transmittance `(t)=0` absorptance `(a)=1`. It is clear that when heated the black body will radiated all energy. Which is absorbed by it.


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