A perfect black body is ........ | vedclass

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Question

(D) hollow enclosure blackened inside and having a small hole is a very good example of a black body.When light enters through the small hole,it under

Vedclass · Accepted Answer

$A$ hollow enclosure with its inner surface blackened and having a small hole

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(D) hollow enclosure blackened inside and having a small hole is a very good example of a black body.When light enters through the small hole,it undergoes multiple reflections within the cavity.Since the inner surface is blackened,a significant fraction of the incident radiation is absorbed at each reflection.Because the hole is very small,the probability of the radiation escaping back out is extremely low.Consequently,almost all incident radiation is absorbed,making it an ideal black body.

$A$ perfect black body is ........

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