12th Class Physics Ray Optics Question Bank MCQs - Ray Optics and Optical Instruments

The magnifying power of a telescope is M. If the focal length of the eyepiece is halved, the magnifying power will become

A) \[M\,/\,2\]

B) \[4M\]

C) \[M\,/\,4\]

D) None of the above

Correct Answer: D

Solution :

Option [d] is correct.

Explanation: Magnifying power is inversely proportional to the focal length of eyepiece.

So, if focal length of the eyepiece is halved, the magnification will be \[2M\].