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 ?

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

Explain the existence of threshold frequency of incident radiation for photoelectric emission from a given surface.

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.