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General
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Question
Two coherent narrow slits emitting wave length l in the same phase are placed parallel to each other at a small separation of 2 l , the sound is detected by moving a detector on the screen S at a distance D (>> l ) from the slit S1 as shown in figure.Find the distance x such that the intensity at P is equal to the intensity at O
- D
- 3D
The correct answer is:
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