JEE Main 2022PhysicsWave OpticsEasyMCQ

JEE Main 2022 — Wave Optics Question with Solution

JEE Main 2022 (26 Jul Shift 1)

Question

In young's double slit experiment, the fringe width is 12 mm. If the entire arrangement is placed in water of refractive index 43, then the fringe width becomes (in mm)

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Show full solutionCorrect option: B
Correct answer
B9

Step-by-step explanation

For a given light wavelength corresponding a medium of refractive index μ

λmed =λvacumm μ.

And we know that fringe width β=λD d

Therefore, βmed =βvacuum μ=1243=9 mm

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About this question

This is a previous-year question from JEE Main 2022, covering the Wave Optics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.