Assertion (A) : Interference pattern is made by using blue light instead of red light, the fringes becomes narrower.
Reason (R ) : In Young's double slit experiment, fringe width is given by the relation `beta = (lambda D)/(d)`

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

Answer

A

Explanation

`beta= (lambdaD)/(d)`