First slide

Young's double slit Experiment

Question

In Young's double slit interference experiment if the slit is made 3 folds the fringe width becomes

Easy

A

1 /3 fold
B

3 fold
C

3/6 fold
D

6 fold

Solution

$β = \frac{λD}{2 d} When the slit is made 3 folds, then β^{'} = \frac{λD}{3 (2 d)} = \frac{β}{3} Hence fringe width becomes t / 3 fold .$

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