JEE Main 2012 — Ray Optics Question with Solution
JEE Main 2012 (12 May Online)
Question
We wish to make a microscope with the help of two positive lenses both with a focal length of 20 each and the object is positioned from the objective lens. How far apart the lenses should be so that the final image is formed at infinity?
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
To obtain final image at infinity, object which is the image formed by objective should be at focal distance of eye-piece. By lens formula (for objective) Therefore the distance between the lenses
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Ray Optics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2012, 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.