JEE Main 2019PhysicsWave OpticsEasyMCQ

JEE Main 2019 — Wave Optics Question with Solution

JEE Main 2019 (09 Jan Shift 2)

Question

In a young's double slit experiment, the slits are placed 0.320 mm apart. Light of wavelength λ=500 nm is incident on the slits. The total number of bright fringes that are observed in the angular range -30o≤θ≤30o is:

Choose an option

Show full solutionCorrect option: B
Correct answer
B641

Step-by-step explanation

dsinθ=nλ

n=0.320×10-3×12500×10-9

=320

Hence number of maxima =320×2+1=641

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About this question

This is a previous-year question from JEE Main 2019, 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.