Optics Question 1068
Question: In Young’s double slit interference experiment, the slit separation is made 3 fold. The fringe width becomes
[CPMT 1982, 89]
Options:
A) 1/3 times
B) 1/9 times
C) 3 times
D) 9 times
Show Answer
Answer:
Correct Answer: A
Solution:
$ \beta \propto \frac{1}{d} $
Therefore If d becomes thrice, then $ \beta $ become becomes $ \frac{1}{3} $ times.
