Question

What is the correct formula for the total emissive power of the gray body $\left(E_g\right)$?

• A. $\left(E_g\right)=T^4$
• B. $\left(E_g\right)=T^2$
• C. $\left(E_g\right)=\left(1/T^4\right)$
• D. None of the above

Answer 1

The correct option is D None of the above

Formula for emissive power of gray body $=E_g=ϵ\sigma T^4$

where, ($ϵ$ is emissivity, $\sigma$ is stefan's constant, $T$ is absolute temperature)