Q. In photoelectric effect, the electrons are ejected from metals if the incident light has a certain minimum
A) Wavelength
B) Frequency
C) Amplitude
D) Angle of incidence
Explanation
(b) In photoelectric effect for a given photosensitive material, there exists a certain minimum cut-off frequency, called the thershold frequency, below which no emission of photoelectrons takes place no matter how intense the light is.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.