The number of photoelectrons emitted from a photosensitive surface

The kinetic energy of photoelectrons emitted by a photosensitive surface depends on the internsity of the incident radiation

The kinetic energy of photoelectrons emitted by a photosensitive surface depends on the internsity of the incident radiation

Assertion (A) : Kinetic energy of photoelectrons emitted by a photosensitive surface depends upon the frequency of incident photon. Reason (R ): The ejection of electrons from metallic surface is possible with frequency of incident photon below the threshold frequency.