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

Options

A. initially, it is the darkest body and at later times, the brightest
B. it is the darkest body at all times
C. It cannot be distinguished at all times
D. initially, it is the darkest body and at later times, it cannot be distinguished.

Answer

A

Explanation

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).