In Young's double slit experiment, the separation between the slits is halved and the distance between the screen is doubled. The fringe width is

Question

In Young's double slit experiment, the separation between the slits is halved and the distance between the screen is doubled. The fringe width is, Unchanged, Halved, Doubled, Quadrupled

MARKS App · Accepted Answer

Fringe width, β = D λ d ⇒ β 2 β 1 = D 2 D 1 × d 1 d 2 ⇒ β 2 β 1 = 2 D D × 2 d d ⇒ β 2 β 1 = 4 ⇒ β 2 = 4 β 1

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