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Sir,how the wave theory fails to explain photoelectric effect?

In case of a wave the energy is represented by the amplitude of the wave. So, considering light to be strictly of wave nature, a high intense beam of light of lower frequency should have enough energy to knock electrons away from their molecular orbits. But this is not observed practically.

Practically, photoelectric effect is observed for light of certain frequency only. If the frequency of light is below the threshold frequency then no photoelectric effect is shown whatever the intensity of the light is. This indicates energy from light is absorbed by the electrons in quanta.

This results in the failure of the wave theory of light to explain photoelectric effect.

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according to the wave theory of light ....the electrons absorb energy continuously ....hence greater the intensity more energy will be absorbed ...hence more will be photoelectric emission will be more .moreover the the photoelectric emission will no longer depend on the frequent of the incident light as any light which is sufficiently intense will emit electons ..therefore a thresshlod frequency should not exist.these expections contradict the experiments performed

furthermore,the absorption of energy by the electrons takes place continously all over the wavefront and since a large number of electrons absorb energy...the energy absorbed by each electron will be very less,therefore it hours to cross the minimum energy level and emit a electron but experiments have shown that photoelectric emission occurs instantaneously.

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