1.

An ideal black body at room temperature is thrown into a furnace. It is observed that :

Answer»

initially, it is the darkest body and at LATER times, the brightest
it is the darkest body at all times
It cannot be distinguished at all times
initially, it is the darkest body and at later times, it cannot be distinguished.

Solution :Initially it appears darkest body because it ABSORBS all the radiations but when BECOMES very HOT then it becomes brightest body as it emits MAXIMUM energy.
So correct choice is (a).


Discussion

No Comment Found

Related InterviewSolutions