Q .     The Young's double slit experiment is performed in a medium of refractive index `4/3`. A light of `600` nm wavelength is falling on the slits having `0.45` mm separation. The lower slit `S_2` is covered by a thin glass sheet of thickness `10.4` mm and refractive index `1.5`. The interference pattern is observed on a screen placed 1.5 m from the slits.

(All wavelengths in the problem are for the medium of refractive index `4/3`. Ignore dispersion)

Find the location of central maxima on the `y-`axis.

JEE 1990
A

`4.33` mm

B

`2.16` mm

C

`4.55` mm

D

`5.99` mm

HINT

Geometrical Path difference `Delta x_1 = S_1P - S_2P = (yd)/D` Path difference due to glass sheet `Delta x_2 = (μ_g/μ_m−1)t`

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