Q. The temperature at which a black body of unit area loses its energy at the rate of $1\ joule/second$ is
A) $- 65℃$
B) $65℃$
C) $65\ K$
D) None of these
Explanation
(c) $E = \sigma T^{4} \Rightarrow 5.6 \times 10^{- 8} \times T^{4} = 1$
$\Rightarrow T = \left\lbrack \frac{1}{5.6 \times 10^{- 8}} \right\rbrack^{1/4} = 65\ K$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.