Q. Which of the following is not an essential condition for interference?
A) The two interfering waves must be propagated in almost the same direction or the two interfering waves must intersect at very small angle
B) The wave must have the same period and wavelength
C) The amplitude of the two waves must be equal
D) The two interfering beams of light must originate from the same source
Explanation
The correct answer is Option C: The amplitude of the two waves must be equal.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.