Write importance of Planck's quantum theory.

Explanation

Black body radiation can not be explained by wave theory of light .( Emitand absorb wave frequency and colour of black body radiation is change with temperature )
Theory Plank suggested that atoms and molecules could emit and not is a continuous manner Plank quantities name quantum to the smallest quantity of energy that can be emitted or absorbed.
The energy ( E) or a quantum of radiation is proportional to its frequency ( v ) and is expressed by equation ( E `prop` v )
Important : With this theory Plank was able to explain the distribution of intensity in the rediation from black body as a funtion of frequency or wavelength at different temperature .
E= nhv (Eq. 2.11 ) where n= 0,1,2
n=1 So E =hv = minimum energy