Question

Wien's law is concerned with
(a) relation between emissivity and absorptivity
of a radiating surface
(b) total radiation, emitted by a hot surface
(c) an expression for spectral distribution of
energy of a radiation from any source
(d) a relation between the temperature of a black
body and the wavelength at which there is
maximum radiant energy per unit
wavelength

Answer 1

Answer:

(d) a relation between the temperature of a Black body and the wavelength at which there is maximum radiant energy per unit wavelength

Answer 2

All objects with a temperature above absolute zero (0 K, -273.15 oC) emit energy in the form of electromagnetic radiation. A blackbody is a theoretical or model body which absorbs all radiation falling on it, reflecting or transmitting none.