Physics · 2015
JEE Main · 11 April 2015, Shift 1 · Q25
In a Young's double slit experiment with light of wavelength λ the separation of slits is d and distance of screen is D such that D ≫ d ≫ λ. If the…
In a Young's double slit experiment with light of wavelength $\displaystyle \lambda$ the separation of slits is d and distance of screen is D such that $\displaystyle \mathrm{D} \gg \mathrm{d} \gg \lambda$. If the Fringe width is $\displaystyle \beta$, the distance from point of maximum intensity to the point where intensity falls to half of maximum intensity on either side is :
Official answer
(2)
$\displaystyle \frac{\beta}{4}$
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