write the laws of photoelectric effect by using Einstein's photo electric equations.

The laws of photoelectric emission are given below:

  • For a given metal and frequency of incident radiation, the number of photoelectrons ejected per second is directly proportional to the intensity of the incident light.

  • For a given metal, there exists a certain minimum frequency of the incident radiation below which no emission of photoelectrons takes place. This frequency is called threshold frequency.

  • Above the threshold frequency, the maximum kinetic energy of the emitted photoelectron is independent of the intensity of the incident light, but depends only upon the frequency (or wavelength) of the incident light.

  • The photoelectric emission is an instantaneous process.

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