JEE Main 2018PhysicsWave OpticsMediumMCQ

JEE Main 2018 — Wave Optics Question with Solution

JEE Main 2018 (15 Apr)

Question

Light of wavelength 550 nm falls normally on a slit of width 22.0×10-5 cm. The angular position of the second minima from the central maximum will be (in radians):

Choose an option

Show full solutionCorrect option: D
Correct answer
Dπ6

Step-by-step explanation

asinθ=2λ,  2nd dark

⇒sinθ=2λa=2×550×10−922×10−7⇒θ≃π6 rad

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About this question

This is a previous-year question from JEE Main 2018, 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.