The quantity of heat radiated per unit time by a perfectly black body at 300 K is `81kJ//s`.
Channel: Doubtnut
Date: 2020-05-31

The quantity of heat radiated per unit time by a perfectly black body at 300 K is `81kJ//s`. What is the power radiated by a body of emissivity 0.8 and having the same area as that of the black at 500 K ?