Question
In Young’s double-slit experiment, dark fringes on the
screen occur where:Solution
In Young’s double-slit experiment, dark fringes appear at points where the waves from the two slits arrive out of phase and interfere destructively . This happens when the path difference between the two waves is an odd multiple of λ/2, leading to cancellation of the light intensity at those points. Hence, destructive interference causes dark fringes.
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