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JEE PHYSICS MCQ: WAVE OPTICS

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The conditions for producing sustained interference are

I. Phase difference between interfering waves remains constant with time.

II. Interfering waves have nearly same amplitude levels.

III. Interfering waves are of same frequency.

IV. Interfering waves are moving of opposite directions.

View answer and explanation

Correct option: A

I, II and III

Option A (I, II and III) is correct because sustained interference requires constant phase difference, nearly same amplitudes, and same frequency.

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