JEE Main 2018 — Ray Optics Question with Solution
JEE Main 2018 (15 Apr Shift 2 Online)
Question
A convergent doublet of separated lenses, corrected for spherical aberration, has resultant focal length of . The separation between the two lenses is . The focal lengths of the component lenses
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
For minimum spherical aberration separation,
Resultant focal length
Using and solving, we get and respectively.
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This is a previous-year question from JEE Main 2018, 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.