Question

In Young's double slits experiment the fringe width is o.2mm.If the wave length of the time increased by 10%and separation between the two slists is also increased by 10%, the fringe width will be​

Answer 1

$\huge\mathcal{\underline{\color{purple}Answer}}$

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In Young's Double Slit Experiment (YDSE),

Fringe is given as :

⇒ $β = \frac{λD}{d} =0.2mm$

new setup;

⇒ $D'=D+\frac{10}{100}λD=\frac{11D}{10}$

⇒ $λ'=λ+\frac{10}{100}λ=\frac{11λ}{10}$

∴ Fringe width $=\frac{λ'D'}{d} \\=1.21\frac{λD}{d}\\=0.242mm$

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Hope it Helps !!!