Unit of Stefan's constant is

Options

A. `Wm^(-2)K^(-1)`
B. `Wm K^(-1)`
C. `Wm^(-2)K^(-4)`
D. `Nm^(-2)K^(4)`

Answer

C

Explanation

According to Stefan's Boltzmann law, the energy radiated per second, `E = sigma AT^(4)`
`therefore sigma = (E )/(AT^(4))=(W)/(m^(2)K^(4))=Wm^(-2)K^(-4)`.