Question

If the threshold frequency of a metal for photoelectric effect is $v_{0}$, then which of the following will not happen?

• A. If frequency of the incident radiation is $v_{0},$ then kinetic energy of the electrons ejected is zero
• B. If frequency of incident radiation is $v,$ the kinetic energy of the electrons ejected will be $h v-h v_{0}$
• C. If frequency is kept same at $v$, but intensity is increased, the number of electrons ejected will increase
• D. If frequency of incident radiation is further increased, the number of photoelectrons ejected will increase

Answer 1

Answer: (D)

Increase of intensity (and not frequency) increases the no. of photoelectrons ejected.