A cube, which may be regarded as a perfectly black body, radiates heat at the rate of
Channel: Doubtnut
Date: 2020-06-14

A cube, which may be regarded as a perfectly black body, radiates heat at the rate of 2770.2 watt when its temperature is `27^(@)C`. The volume of the cube is `(sigma=5.7xx10^(8)J//m^(2)" s "K^(4))`