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A double - slit apparatus is immersed in...

A double - slit apparatus is immersed in a liquid of refractive index `1.33` it has slit separation of 1mm and distance between the plane of slits and screen `1.33` m the slits are illuminated by a parallel beam of light whose wavelength in air is 800 nm.
(i) Calculate the fringe width.
(ii) One of the slits of apparatus is covered by a thin glass sheet of refractive index `1.53` Find the smallest thickness of the sheet to bring the adjacent minima on the axis.

A

0.95 mm

B

0.36 mm

C

0.63 mm

D

0.56 mm

Text Solution

Verified by Experts

The correct Answer is:
C
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