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Physics Question on Wave optics

In Young's double slit experiment the separation between the slits is halved and the distance between the slits and the screen is doubled. The fringe width will

A

be quadrupled

B

be doubled

C

be halved

D

remain the same.

Answer

be quadrupled

Explanation

Solution

β=λ Dd\beta =\frac{\lambda\,D}{d}