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  4. In Young's double-slit interference experiment, the slit separation is made 3 fold. The fringe width becomes

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Q. In Young's double-slit interference experiment, the slit separation is made $3$ fold. The fringe width becomes

NTA AbhyasNTA Abhyas 2020

Solution:

$\beta \propto \frac{1}{d}\Rightarrow $ If $d$ becomes thrice, then $\beta $ become becomes $\frac{1}{3}$ times.