Optics Question 64
Question: Assertion : Interference pattern is made by using blue light instead of red light, the fringes becomes narrower. Reason : In Young’s double slit experiment, fringe width is given by relation $ B=\frac{\lambda D}{d} $ .
[AIIMS 1999]
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: A
Solution:
$ \beta =\frac{\lambda D}{d} $
