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 $



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