Q. An interference pattern was made by using red light. If the red light changes with blue light, the fringes will become
A) Wider
B) Narrower
C) Fainter
D) Brighter
Explanation
(b) $\beta = \frac{\lambda D}{d} \Rightarrow \beta \propto \lambda$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.