Question

Which one of the following is the correct graph between the maximum kinetic energy (Kₘ) of the emitted photoelectrons and the frequency of incident radiation (v) for a given photosensitive surface ?

Assertion (A) : Electrons are ejected from the surface of zinc when it is irradiated by yellow light. Reason (R) : Energy associated with a photon of yellow light is more than the work function of zinc.

Write Einstein's photoelectric equation. How did Millikan prove the validity of this equation ?

How does Einstein's photoelectric equation explain the emission of electrons from a metal surface ? Explain briefly. Plot the variation of photocurrent with : (a) collector plate potential for different intensity of incident radiation, and (b) intensity of incident radiation.