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Question

In YDSE, light of wavelength λ is used, which emerges in phase from two slits a distance d apart. A transparent sheet of thickness t, refractive index μ=1.17, is placed over one of the slits.
Where does the central maxima of the interference now appear from the center of the screen? (Find the value of y?)

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A
D(μ1)t2d
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B
2D(μ1)td
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C
D(μ+1)td
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D
D(μ1)td
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Solution

The correct option is D D(μ1)td
Due to the introduction of sheet in front of any one slit, the fringes get shifted. This lateral shift is given as
¯¯¯¯¯X=βλ(μ1)t=Dd(μ1)t

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