Q. Two identical light sources $S_{1}$ and $S_{2}$ emit light of same wavelength $\lambda$. These light rays will exhibit interference if
A) Their phase differences remain constant
B) Their phases are distributed randomly
C) Their light intensities remain constant
D) Their light intensities change randomly
Explanation
(a) For interference phase difference must be constant
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.