Question

Two spherical black bodies have radii $?r_1?$ and $'r_2'$ . Their surface temperatures are $'T_1'$ and $'T_2'$. If they radiate same power then $\frac{r_2}{r_1}$ is

• A. $\frac{T_1}{T_2}$
• B. $\frac{T_2}{T_1}$
• C. $(\frac{T_1}{T_2})^2$
• D. $(\frac{T_2}{T_1})^2$

Answer 1

Answer: (C)

$(\frac{T_1}{T_2})^2$

Answer 2

Answer (c) $(\frac{T_1}{T_2})^2$