Q 12-11-077JEE MainJEE Main 2024 (31 Jan, Shift 2)Easy
In a photoelectric effect experiment, light of frequency $1.5$ times the threshold frequency is made to fall on the surface of a photosensitive material. Now if the frequency is halved and the intensity is doubled, the number of photoelectrons emitted will be:
Answer: (C) Zero
The new frequency is $0.75\nu_0$, below the threshold, so no photoelectrons are emitted whatever the intensity.
Solution by Sreeraj P, M.Sc Physics