The wavelength of the radiation emitted by a body depends upon

Options

A. The nature of the surface
B. the area of the surface
C. the temperature of the surface
D. all of the above factors.

Answer

c

Explanation

According to Wien.s displacement law, as the temperature of a black body increases, the maximum intensity of emission shifts (or is displaced) towards shorter wavelengths.
`lambda_(m)T=b=constant`
where `lambda_(m)` is the wavelength at which maximum cmission take place at absolute temperature T