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

(A) : A hollow metallic closed container maintained at a uniform temperature can act as a source of black body radiation. ( R) : All metals act as a black body.

The temperature at which a black body ceases to radiate energy is .

A black body is kept in a hollow enclosure maintained at same temperature as that of the black body. If the black body is replaced by a non-black body of same shape and size, maintained at same temperature, then total radiation emitted by the non-black body

Assertion : A normal body can radiate energy more than a perfectly black body. Reason : A perfectly black body is always black in colour.

Assertion : A normal body can radiate energy more than a perfectly black body. Reason : A perfectly black body is always black in colour.

What acts as a perfect black body in Fery's perfect, black body?

What is a black body ? On what factor does the radiation emitted depend ? Will the total radiation from it be more or less as compared to another body maintained at the same temperautre ? How does total energy radiated from it change with temperature? Is it possible for a black body to radiate white light ?

Assertion : Coefficient of absorption of radiation of an ideal black body is 1 . Reason : An ideal black body emits radiation of all wavelengths.