Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
In an astronomical telescope, the focal lengths of two lenses are $180 \mathrm{~cm}$ and $6 \mathrm{~cm}$ respectively. In normal adjustment, the magnifying power will be
PhysicsRay OpticsJEE Main
Options:
  • A 1080
  • B 200
  • C 30
  • D 186
Solution:
2629 Upvotes Verified Answer
The correct answer is: 30
$|m|=\frac{f_o}{f_e}=\frac{180}{6}=30$

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.