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In the Young's experiment, one of the sl...

In the Young's experiment, one of the slit is covered with a transparent sheet of thickness `3.6xx10^(-3)` cm due to which position of central fringe shifts to a position originally occupied by 30th bright fringe. The refractive index of the sheet, if `lambda=6000Å` is

A

1.5

B

1.2

C

1.3

D

1.7

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The correct Answer is:
A
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