1. Tardigrade
  2. Question
  3. Physics
  4. A concave mirror of focal length f1 is placed at a distance of d from a convex lens of focal length f2. A beam of light coming from infinity and falling on this convex lens - concave mirror combination returns to infinity. The distance d must equal

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A concave mirror of focal length $f_1$ is placed at a distance of d from a convex lens of focal length $f_2$. A beam of light coming from infinity and falling on this convex lens - concave mirror combination returns to infinity. The distance $d$ must equal

AIPMTAIPMT 2012Ray Optics and Optical Instruments

Solution:

Correct answer is (c) $ 2 f_1 +f_2$

Solution Image