JEE PHYSICS MCQ: WAVE OPTICS

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In the following four statements are regarding well defined observable interference pattern.

A) Condition for sustained interference : The two waves should be coherent.

B) Condition for good observation : The separation between light sources should be as small as possible.

C) Condition for good contrast: The amplitudes of interfering waves should be equal (or) at least very nearly equal.

D) Condition for good contrast : Slit width must be very narrow considerably less than the fringe width.

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Correct option: A

All the above are correct

Option A (All the above are correct) is correct because all the listed conditions (coherence, small separation, equal amplitudes, narrow slit width) are necessary for observing a well-defined interference pattern.

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