Q. The number of photo electrons emitted for light of a frequency ν (higher than the threshold frequency ν₀) is proportional to:
A) Threshold frequency (ν₀)
B) Intensity of light
C) Frequency of light (ν)
D) ν − ν₀
Explanation
[Solution from source] Above threshold, each photon ejects at most one electron, so the number of photoelectrons depends on the number of photons arriving per second, i.e. the intensity. The frequency (and ν − ν₀) decides the kinetic energy of the electrons, not their number. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.