Optics Question 434
Question: An astronomical telescope has objective and eye-piece lens of powers 0.5 D and 20 D respectively, its magnifying power will be
[Pb. PET 2002]
Options:
A) 8
B) 20
C) 30
D) 40
Show Answer
Answer:
Correct Answer: D
Solution:
$ M=\frac{f _{o}}{f _{e}}=\frac{P _{e}}{P _{o}}=\frac{20}{0.5}=40 $ .
