JEE Main 2019PhysicsWave OpticsMediumMCQ

JEE Main 2019 — Wave Optics Question with Solution

JEE Main 2019 (09 Jan Shift 1)

Question

Two coherent sources produce waves of different intensities which interfere. After interference, the ratio of the maximum intensity to the minimum intensity is 16. The intensity of the waves are in the ratio:

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Show full solutionCorrect option: A
Correct answer
A25:9

Step-by-step explanation

Imax=I1+I22

Imin=I1-I22

⇒    ImaxImin=(I1+I2)2(I1-I2)2

⇒  161=(I1+I2)2(I1-I2)2

⇒  41=I1+I2I1-I2

⇒I1I2=259

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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.