In the photoelectric effect, the K.E. of electrons emitted from the metal surface depends upon

Question

In the photoelectric effect, the K.E. of electrons emitted from the metal surface depends upon (A) intensity of light (B) frequency of incident light (C) velocity of incident light (D) both intensity and velocity of light

Tardigrade Admin · Accepted Answer

From Einstein's photoelectric equation the maximum kinetic energy of photoelectrons emitted from metal surface is

E_{K}

and

W

is work function, then

E_{K} = h v - W

If

v_{0}

is threshold frequency, then

W = h v_{0}

∴ E_{K} = h v - (h v)_{0} = h (v - v_{0})

From the above equation, it is clear that maximum kinetic energy of electron will increase almost linearly with increase in the frequency of the incident light.

Q. In the photoelectric effect, the K.E. of electrons emitted from the metal surface depends upon

intensity of light

frequency of incident light

velocity of incident light

both intensity and velocity of light