Optics Question 426

Question: An astronomical telescope has a magnifying power 10. The focal length of eyepiece is 20 cm. The focal length of objective is

[MP PMT 2002, 03; Pb. PET 2004]

Options:

A) 2 cm

B) 200 cm

C) 12cm

D) 1200cm

Show Answer

Answer:

Correct Answer: B

Solution:

m=fofe10=fo20fo=200 cm



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