In Young's double slit experiment, the slit separation is made threefold by keeping remaining setup same,…
In Young's double slit experiment, the slit separation is made threefold by keeping remaining setup same, the fringe width becomes
$\frac{1}{9}$ times
$\frac{1}{3}$ times
9 times
3 times
Solution
Fringe width $\beta$, in terms of slit separation $d$ and screen distance $D$ is given by,
$\beta=\frac{\lambda D}{d}$
If $d$ is made three times, fringe width becomes $\frac{1}{3}$ times