Q. Four convergent lenses have focal lengths $100\ cm,\ 10\ cm,\ 4\ cm$ and $0.3\ cm$. For a telescope with maximum possible magnification, we choose the lenses of focal length
A) $100\ cm,\ 0.3\ cm$
B) $10\ cm,\ 0.3\ cm$
C) $10\ cm,4\ cm$
D) $100\ cm,\ 4\ cm$
Explanation
(a) $m = - \frac{f_{o}}{f_{e}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.