A black body at temperature `227^(@)C` radiates heat at the rate of 5 cal/`cm^(2)`, at
Channel: Doubtnut
Date: 2020-06-14

A black body at temperature `227^(@)C` radiates heat at the rate of 5 cal/`cm^(2)`, at a temperature of `27^(@)C`, the rate of heat radiated per unit area per unit time in cal/`cm^(2)`s, is