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

Options

A. `(300)^(4)`
B. `(300)^(3)`
C. `300`
D. `(300)^(2)`

Answer

C

Explanation

From Stefan's law the total radiant energy (E) emitted per second per unit surface area of a black body is proportional to the forth power of th absolute temperature (T) of the body
i.e., `E = sigma T^(4)`
where `sigma` is Stefan's constant
Hence `E prop (300)^(4)`.