For two fixed coherent point sources A and B, the locus of points for which the magnitude of the path difference |PA-PB| is a fixed non-zero constant is generally a
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Question

For two fixed coherent point sources A and B, the locus of points for which the magnitude of the path difference |PA−PB| is a fixed non-zero constant is generally a

G1 Physics · Accepted Answer

A hyperbola is the locus of points for which the magnitude of the difference of distances from two fixed foci is constant. Here A and B act as the two fixed foci. Therefore, |PA−PB| = constant describes a hyperbola. Correct option: C.