Question

The maximum velocity of the photoelectrons emitted from the surface is v when light of frequency n falls on a metal surface. if the incident frequency is increased to 3n,

Answer 1

Laws of Photo-Electricity

(a) Photoelectric effect is an instantaneous process.

(b) Photoelectric current is directly proportional to the intensity of incident light and is independent of frequency.

(c) The stopping potential and hence themaximum velocity of the electrons depends upon the frequency of incident light and is independent of its intensity. 

(d) The emission of electrons stops below a certain minimum frequency known asthreshold frequency.