A slit S is illuminated by monochromatic source of light to give two coherent sources P1 and P2 These - Physics - Wave Optics

Question

A slit S is illuminated by monochromatic source of light to give
two coherent sources P1 and P2 These given bright and dark bands on
a screen At a point R on the screen there is a dark fringe what
relation must exist between the lengths P1R and P2R?

Sanjay Singh · Accepted Answer

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A slit S is illuminated by monochromatic source of light to give two coherent sources P1 and P2 .These given bright and dark bands on a screen .At a point R on the screen there is a dark fringe. what relation must exist between the lengths P1R and P2R?