Question

A body with area $A$ at a material temperature $T$ and emissivity $e$$=$$0.6$ is kept inside a spherical black body. what will be the maximum energy radiated per second?

• A. 0.60 $\sigma$ AT${}^4$
• B. 1.00 $\sigma$ AT${}^4$
• C. 0.80 $\sigma$ AT${}^4$
• D. 0.40 $\sigma$ AT${}^4$

Answer 1

Answer: (A)

0.60 $\sigma$ AT${}^4$

We know that $E=\sigma ϵA{T}^4$
$E_{max}=0.60\times \sigma \times A\times T^4$