Q. An astronomical telescope has a magnifying power 10, the focal length of the eye-piece is 20 cm. The focal length of the objective is
A) $\frac{1}{200}\ cm$
B) $\frac{1}{2}\ cm$
C) 200 cm
D) 2 cm
Explanation
The correct answer is Option C: 200 cm.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.