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In Young's double-slit experiment, let A...

In Young's double-slit experiment, let A and B be the two slit. A thin film of thickness t and refractive index `mu` is placed in front of A. Let `beta = ` fringe width. Then the central maxima will shift

A

towards `A`

B

towards `B`

C

by `t(mu-1)(beta)/(lamda)`

D

by `mut (beta)/(lamda)`

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The correct Answer is:
A, C
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