alleryIn Young's double slit experiment, fringe width β with screen at distance D and slit separation d:
Aβ = λd/D
Bβ = λD/d
Cβ = λ × D × d
Dβ = D/(λd)
Answer & Solution
Correct answer: B. β = λD/d
β = λD/d.
Distance between successive bright (or dark) fringes. Independent of order.
Wider for longer wavelength or larger D, narrower for larger d.
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