Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What

Question

Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?\

Professor PC Thomas Classes · Answer

(d) : Initially, $v=1.5 v_{0}$ If the frequency is halved, $v^{\prime}=\frac{\dot{u}}{2}=\frac{1.5 v_{0}}{2}<v_{0}$\ Hence, no photoelectric emission will take place.\