Photoelectric effect is the phenomenon in which (a) photons come out of a metal when it is hit by a beam of electrons. (b) photons come out of the nucleus of an atom under the action of an electric field. (c) electrons come out of a metal with a constant velocity (d) electrons come out of a metal with different velocity not greater than a certain value which depends only on the frequency of the incident light wave and not on its intensity.

 Correct option is D)

Electrons come out of a metal with different velocity not greater than a certain value which depends only on the frequency of the incident light wave and not on its intensity.