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JEE Main 2022 (29 Jun, Shift 1) · YDSE: Fringe Width & Fringe Positions

YDSE: Fringe Width & Fringe Positions question from JEE Main 2022 (29 Jun, Shift 1)

Q40JEE Main 2022 · 29 JUN · SHIFT 1Easy

YDSE: Fringe Width & Fringe Positions

Using Young's double slit experiment, a monochromatic light of wavelength 5000 $\text{Å}$ produces fringes of fringe width 0.5 mm. If another monochromatic light of wavelength 6000 $\text{Å}$ is used and the separation between the slits is doubled, then the new fringe width will be:

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Answer: (d)

$\beta \propto \frac{\lambda}{d}$
$\beta' = 0.5\times\frac{6000}{5000}\times\frac{1}{2} = 0.3$ mm
So the answer is (d).

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