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

Options

A. initially it is the darkest body and later 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 later it cannot be distinguished

Answer

A

Explanation

When the temperature of black body becomes equal to the temperature of furnace, it will radiate maximum energy, so it will be brightest. Initially it will absorb all radiations, so it will be darkest.