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Question

In Young's double slit experiment, the fringe width is found to be $0.4$ mm. If the whole apparatus is immersed in water of refractive index $(4 / 3)$ , without disturbing the geometrical arrangement, what is the new fringe width?

A

$0.3$ mm

B

$0.4$ mm

C

$1.33$ mm

D

$0.5$ mm

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Updated on : 2022-09-05

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Correct option is A)

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