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Q. Interference fringes are being produced on screen $X Y$ by the slits $S_{1}$ and $S_{2} .$ In figure, the correct fringe locus isPhysics Question Image

Wave Optics

Solution:

Interference fringes are bands on screen $X Y$ runnings parallel to the lengths of slits. Therefore, the locus of fringes is represented correctly by $W_{3}\, W_{4}$.