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A double slit apparatus is immersed in a...

A double slit apparatus is immersed in a liquid of refractive index 1.33. It has slit and the screen 1 mm. The slits are illuminated by a parallel beam of light whose wavelength in air is `6300 Å`
a. calculate the fringe width.
b. One of the slits of the apparatus is covered by a thin glass sheet of refractive index 1.53. Find the smallest thickness of the sheet to bring athe adjacent minima on the axis.

A

`(1.33xx0.63)mm`

B

`(0.63)/(1.33)mm`

C

`(0.63)/((1.33)^(2))mm`

D

`0.63mm`

Text Solution

Verified by Experts

The correct Answer is:
D
`beta = (beta)/(mu) = (lambda D)/(mu d)`
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