Statement - I :No interference pattern is detected when two coherent sources are very close to each other. (i.e separation almost zero)
Statement - II :The fringe width of interference pattern is inversely proportional to the distance between the two slits

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Both statements I and II are correct

Statement-I is incorrect and statement-II is correct

Both statements I and II are incorrect

Statement-I is correct and statement-II is incorrect

answer is A.

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Detailed Solution

When d is negligibly small, fringe width. β which is proportional to $\frac{1}{d}$
may become too large. Even a single fringe may occupy the whole screen. Hence the pattern cannot be detected.

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