Planck’s hypothesis of energy quanta led to the theoretical Planck’s radiation law, which agrees with the experimental blackbody radiation curve; it also explains Wien’s and Stefan’s laws The classical approach does not explain the blackbody radiation curve

To explain the blackbody radiation curve, Planck assumed that the exchange of energy between radiation and cavity walls takes place only in discrete quanta of energy. The experimental Stefan’s law states that the total power of radiation emitted across the entire spectrum of wavelengths at a given temperature is proportional to the fourth power of the Kelvin temperature of the…

Planck’s hypothesis of energy quanta — energy exchanges between the radiation and the walls take place only in the form of discrete energy quanta. given temperature — proportional to the fourth power of the Kelvin temperature of the…. blackbody radiation — radiation emitted by a blackbody. blackbody — perfect absorber/emitter.