Posted by Last updated on August 29th, 2020 at 01:26 am
Einstein’s Photoelectric Equation :
According to Einstein, light of frequency 
consists of a shower of photons, is of energy 
. When a photon of light of frequency is incident on a metal, a part of the energy acquired by the electron is used to pull out the electron from the surface of the metal and the rest of it is utilized in imparting K.E. to the emitted electron.
consists of a shower of photons, is of energy 
. When a photon of light of frequency is incident on a metal, a part of the energy acquired by the electron is used to pull out the electron from the surface of the metal and the rest of it is utilized in imparting K.E. to the emitted electron.Let, 
be the energy spent in extracting the electron from the emitter and 
the K.E. of the photo-electron.
be the energy spent in extracting the electron from the emitter and 
the K.E. of the photo-electron.Then, 
This relation is known as Einstein’s Photoelectric Equation. If, 
is the threshold frequency, then, 
is the threshold frequency, then, 
Where, 
is the maximum velocity acquired by the electron.
is the maximum velocity acquired by the electron.
