JEE Main 2019PhysicsRay OpticsEasyMCQ

JEE Main 2019 — Ray Optics Question with Solution

JEE Main 2019 (12 Apr Shift 1)

Question

The value of numerical aperture of the objective lens of a microscope is 1.25. If light of wavelength 5000 Å is used, the minimum separation between two points, to be seen as distinct, will be:

Choose an option

Show full solutionCorrect option: B
Correct answer
B0.24 μm

Step-by-step explanation

Resolving limit=0.61λd=0.61×5000×10-101.25=0.24 μm

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About this question

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