Q. When green light is incident on the surface of metal, it emits photo-electrons but there is no such emission with yellow colour light. Which one of the colours can produce emission of photo-electrons
A) Orange
B) Red
C) Indigo
D) None of the above
Explanation
(c) Wave length of green light is threshold wave length. Hence for emission of electron, wave length of Indigo light < wavelength of green light
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.