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A double slit apparatus is immersed in l...

A double slit apparatus is immersed in liquid of refractive index `mu_(m)`. The distance between the slits is d and distasnce between plane of slits and screen as `D(D gt gt d)`. The slits are illuminated by parallel beem of wavelegth `lamda'`. The smallest thickness of a sheet of refractive index `mu_(p)` to bring adjacent minima on the axis is

A

`(lamda')/(2(mu_(p)-mu_(m)))`

B

`((mu_(p)-mu_(m))lamda')/2`

C

`(lamda')/((mu_(p)-mu_(m)))`

D

`(mu_(p)-mu_(m))lamda'`

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TARGET PUBLICATION-INTERFERENCE AND DIFFRACTION-EVALUATION TEST
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