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?

Question

2 Answers

kritika · Answer 1 · 2021-12-29T05:49:46+0000

Solution:

$\begin{aligned} &K_{1}=1.5 h v_{0}-\phi_{0}=0.5 h v_{0} \\ &K_{2}=\frac{1.5}{2} h v_{0}-h v_{0}=-0.25 h v_{0} \end{aligned}$

$\because$ Kinetic energy can never be negative, so no emission and

$i=0$