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 ?

In photoelectric effect experiment, show the variation of (a) photocurrent with collector plate potential for a given surface for different intensities of incident radiation. Do the curves meet at any point ? If so, why ? (b) photocurrent with intensity of radiation incident on a surface keeping the frequency and plate potential fixed.