Explain why, for the photoelectric effect, the existence of a threshold frequency and a very short emission time provide evidence for the particulate nature of EM radiation as opposed to wave theory. Please be very simple i need to get a good grasp on this.

Question

anonymous · Answer

According to Classical theory, Electrons are not emitted Instantaneously but it takes time to eject electrons.(False Statement)
Classical theory States that Intensity of light depends on Kinetic energy of Electrons.(False)
EM theory states that Electrons are emitted Instantaneously and their Kinetic energy depends upon frequency of incident light.(TRUE)

anonymous · Answer

@mujjazi thank you! That was very clear :)