Question
Assertion : A hollow metallic closed container maintained at a uniform temperature can act as a source of black body radiation.
Reason : All metals acts as a black body

Answer

(c) Hollow metallic closed container maintained at a uniform temperature can act as source of black body. It is also wellknown that all metals cannot act as black body because if we take a highly metallic polished surface. It will not behave as a perfect black body.

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