A black body, at a temperature of `227^@C`, radiates heat at a rate of 20 cal `m^(-2)s^
Channel: Doubtnut
Date: 2020-05-24

A black body, at a temperature of `227^@C`, radiates heat at a rate of 20 cal `m^(-2)s^(-1)`. When its temperature is raised to `727^@C`, the heat radiated by it in cal `M^(-2)s^(-1)` will be closest to