Relation between einstiens A and B coefficients in engineering physics 1 free pdf download
Relation (4) shows that transition probability of absorption is equal to transition probability of induced emission. Relation (4) has also been proved in semiclassical theory of radiation by using perturbation theory. Equation (5) shows that A21/B21 is proportional to ν3. This is the ratio of Einsteinís
A coefficient of spontaneous emission and Einsteinís B coefficient of induced emission.