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To make the central fringe at the centre...

To make the central fringe at the centre O, a mica sheet of refractive index 1.5 is introduced . Choose the correct statement(s). `(D gt gt d gt gt lambda)`

A

The thickness of sheet is `2(sqrt(2) - 1)d` infront of `S_(1)`

B

The thickness of sheet is `(sqrt(2) - 1)d` infront of `S_(2)`

C

The thickness of sheet is `2sqrt(2) - 1)d` infront of `S_(1)`

D

The thickness of sheet is `(2sqrt(2) - 1)d` infront of `S_(1)`

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The correct Answer is:
A
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