Q. For constructive interference to take place between two monochromatic light waves of wavelength $\lambda$, the path difference should be
A) $(2n - 1)\frac{\lambda}{4}$
B) $(2n - 1)\frac{\lambda}{2}$
C) $n\lambda$
D) $(2n + 1)\frac{\lambda}{2}$
Explanation
(c) For constructive interference path difference is even multiple of $\frac{\lambda}{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.