Certain substance emits only the wavelengths `lamda_1,lamda_2,lamda_3` and `lamda_4` when it is at a high temperature, it will absorb only the following wavelengths

Options

A. `lamda_1`
B. `lamda_2`
C. `lamda_1` and `lamda_2`
D. `lamda_1`,`lamda_2`,`lamda_3` and `lamda_4`

Answer

D

Explanation

If a body emits wavelength `lamda_1`,`lamda_2`,`lamda_3` and `lamda_4` at a high temperature then at a lower temperature it will absorb the radiation of same wavelength. This is accordance with Kirchhoff's law