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A young's double slit apparatus is immer...

A young's double slit apparatus is immersed in a liquid of refractive index 1.33.It has slit separation of 1 mm and interference pattern is observed on the screen at a distance 1.33 m from plane of slits.The wavelength in air is `6300 Å`
One of the slits of the apparatus is covered by a thin glass sheet of refractive index 1.53. Find the fringe width

A

0.63mm

B

1.26mm

C

1.67mm

D

2.2mm

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The correct Answer is:
A
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