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JEE MAIN 2021
25-07-2021 S1
Question
In the Young's double slit experiment, the distance between the slits varies in time as $d(t)=d_0+a_0 \sin \omega t$; where $d_0 \omega$ and $a_0$ are constants. The difference between the largest fringe width and the smallest fringe width obtained over time is given as :
Select the correct option:
A
$\frac{2 \lambda \mathrm{D}\left(\mathrm{d}_0\right)}{\left(\mathrm{d}_0^2-\mathrm{a}_0^2\right)}$
B
$\frac{2 \lambda D a_0}{\left(d_0^2-a_0^2\right)}$
C
$\frac{\lambda \mathrm{D}}{\mathrm{d}_0^2} \mathrm{a}_0$
D
$\frac{\lambda D}{d_0+a_0}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
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