Statement - I :The pattern and position of fringes always remain same even after the introduction of transparent medium in a path of one of the slits of young’s experiment
Statement - II :The central fringe bright or darkness is independent of the initial phase difference between the two coherence sources.

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Both statements I and II are correct

Statement-I is correct and statement-II is incorrect

Statement-I is incorrect and statement-II is correct

Both statements I and II are incorrect

answer is D.

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Detailed Solution

By putting the transparent medium like glass the pattern will shift on the screen given by $∆ y = \frac{D}{d} (μ - 1) t$

central fringe is always bright.

intensity on screen is given by $I_{r} = 4 I_{o} \cos^{2} \frac{ϕ}{2}$

the phase difference $ϕ$ is always $0^{0}$ for central bright baand

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