A spherical body of area A and emissivity `e=0.6` is kept inside a perfectly black body. Total heat radiated by the body at temperature T

Options

A. `0.4sigmaAT^(4)`
B. `0.8sigmaAT^(4)`
C. `0.6sigmaAT^(4)`
D. `1.0sigmaAT^(4)`

Answer

C

Explanation

Heat radiated at temperature `T,Q=insigmaAT^(4)=0.6sigmaAT^(4)`