Q. If the focal length of objective lens is increased then magnifying power of :
A) microscope will increase but that of telescope decrease.
B) microscope and telescope both will increase
C) microscope and telescope both will decrease
D) microscope will decrease but that of telescope will increase.
Explanation
[Solution] Microscope M ∝ $\frac{1}{f_o}$ (decreases); telescope M = $\frac{f_o}{f_e}$ (increases). Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.