Question

A black body is at temperature $300K$. It emits energy at a rate, which is proportional to

• A. ${\left(300\right)}^4$
• B. ${\left(300\right)}^3$
• C. ${\left(300\right)}^2$
• D. $300$

Answer 1

The correct option is A ${\left(300\right)}^4$

For black body radiation
$E=\sigma T^4$ or $E\propto T^4$
Rate of emission of energy $\propto {\left(300\right)}^4$