The classical electrodynamics approach to explain the photoelectric effect and the photoelectric emission

By re-analyzing the photoelectric effect, the limitations of Einstein's photon hypothesis are identified and the relation between the photoelectron's kinetic energy and the circular frequency of the incident light is reinterpreted using classical electrodynamics. And it is realized that photoelectric emission is dependent on the incident light's circular frequency ω and the photon density of the incident light.