Assertion (A) : Black body is an ideal body that emits and absorbs radiations of all frequencies. Reason (R) : The frequency of radiation emitted by a body goes from a lower frequency to higher frequency with an increase in temperature.

Assertion (A) : Black body is an ideal body that emits and absorbs rad

1.	Assertion (A) : Black body is an ideal body that emits and absorbs radiations of all frequencies. Reason (R) : The frequency of radiation emitted by a body goes from a lower frequency to higher frequency with an increase in temperature.
Answer» Both A and R are TRUE and R is the correct EXPLANATION of A. Both A and R are true and R is not the correct explanation of A. A is true and R is false. Both A and R are false. Solution :Assertion is true and REASON is false. The body which absorbs and emits all RADIATIONS at all frequency is called perfect black body. With rise in temperature, frequency increases.