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A thin mica sheet of thickness 2xx10^-6m...

A thin mica sheet of thickness `2xx10^-6m` and refractive index `(mu=1.5)` is introduced in the path of the first wave. The wavelength of the wave used is `5000Å`. The central bright maximum will shift

A

2 fringes upwards

B

2 fringes downwards

C

10 fringes upwards

D

None of these

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The correct Answer is:
D
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