Q. Energy is being emitted from the surface of a black body at $127℃$ temperature at the rate of $1.0 \times 10^{6}J/s - m^{2}$. Temperature of the black body at which the rate of energy emission is $16.0 \times 10^{6}J/s - m^{2}$ will be

A) $254℃$
B) $508℃$
C) $527℃$
D) $727℃$
Explanation

(c) $\frac{E_{2}}{E_{1}} = \left( \frac{T_{2}}{T_{1}} \right)^{4} \Rightarrow T_{2} = \left( \frac{E_{2}}{E_{1}} \right)^{1/4} \times T_{1} = (16)^{1/4} \times (273 + 127)$
$\Rightarrow T_{2} = 800\ K = 527℃$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.