Optics Question 425
Question: A Galileo telescope has an objective of focal length $ 100cm $ and magnifying power 50. The distance between the two lenses in normal adjustment will be
[BHU 2002; Pb. PET 2002]
Options:
A) 96 cm
B) 98 cm
C) 102 cm
D) 104 cm
Show Answer
Answer:
Correct Answer: B
Solution:
By using $ m=\frac{f _{o}}{f _{e}}\Rightarrow f _{e}=\frac{100}{50}=2\ cm $ .
Also $ L=f _{o}-f _{e}=100-2=98\ cm $
