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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Wave Optics
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In Young's double slit experiment if width of slit is made 3 folds, the fringe width becomes

$(a)\;\frac{1}{3}\;times \\ (b)\;2\;times \\ (c)\;\frac{2}{3}\;times \\ (d)\;2\;times $

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$\beta= \large\frac{D \lambda}{d}$
if d is made 3 times
$\beta$ becomes $\large\frac{1}{3}$ times
Hence a is the correct answer.


answered Jan 23, 2014 by meena.p
edited Jul 15, 2014 by thagee.vedartham

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