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In an interference experiment, when a gl...

In an interference experiment, when a glass plate of refractive index 1.5 is introduced in the path of one of the beams, fringes are displaced by `x`. When the glass plate is replaced by another transparent plate of same thickness shift in the fringes is `3/2 x`. Refractive index of second transparent plate is

A

2.25

B

2

C

1.75

D

1.25.

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