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The Diagram Shows a Single Slit with the Direction to a Point

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The diagram shows a single slit with the direction to a point P on a distant screen (not shown) .At P, the pattern has its maximum nearest the central maximum.If X and Y are the edges of the slit, what is the path length difference (PX) - (PY) ?  The diagram shows a single slit with the direction to a point P on a distant screen (not shown) .At P, the pattern has its maximum nearest the central maximum.If X and Y are the edges of the slit, what is the path length difference (PX) - (PY) ?   A)   \lambda /2  B)   \lambda   C)  3 \lambda /2  D)  2 \lambda   E)  5 \lambda /2


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