Given below are two statements, one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A) : In the photoelectric effect, the electrons are ejected from the metal surface as soon as the bulb of light of frequency strikes the surface.
Reason ( R ) : When the photon of any energy strikes an electron in the atom, transfer of energy from photon to the electron takes place.
In the light of the above statement, choose the appropriate answer from the options given below,

The correct option is B Both Assertion and Reason are incorrect.

Photoelectric effect is defined as the ejection of electrons from the metal surface as soon as the beam of light of appropriate energy (above a threshold) strikes the surface.In photoelectric effect, a given metal has the characteristic threshold frequency (ν0) that is required for ejection of the electron. Threshold energy is called the work function (hν0) of the metal and the excess energy gets converted to the kinetic energy of the photo electron. Since each photon can eject one electron from the surface, the number of electrons ejected will therefore depend upon the number of photons struck per unit area or the intensity of light and not on the energy/frequency of light. As excess of energy will change the kinetic energy of the ejected photon and not their number.