Optics Question 1123
Question: An interference pattern was made by using red light. If the red light changes with blue light, the fringes will become
[BHU 2001]
Options:
A) Wider
B) Narrower
C) Fainter
D) Brighter
Show Answer
Answer:
Correct Answer: B
Solution:
$ \beta =\frac{\lambda D}{d}\Rightarrow \beta \propto \lambda $
