JEE Main 2026 — Ray Optics Question with Solution
JEE Main 2026 (24 January Shift 1)
Question
In a microscope of tube length 10 cm two convex lenses are arranged with focal length of 2 cm and 5 cm. Total magnification obtained with this system for normal adjustment is . The value of is .
Choose an option
Show full solutionCorrect option: B
Correct answer
B2
Step-by-step explanation
For a microscope in normal adjustment, magnification is given by
where is tube length (10 cm), is objective focal length (2 cm), is eyepiece focal length (5 cm), and is least distance of distinct vision (25 cm).
Therefore,
where is tube length (10 cm), is objective focal length (2 cm), is eyepiece focal length (5 cm), and is least distance of distinct vision (25 cm).
Therefore,
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This is a previous-year question from JEE Main 2026, 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.