Optics Question 403

Question: A Gallilean telescope has objective and eye-piece of focal lengths 200 cm and 2 cm respectively. The magnifying power of the telescope for normal vision is

[MP PMT 1996]

Options:

A) 90

B) 100

C) 108

D) 198

Show Answer

Answer:

Correct Answer: B

Solution:

For normal vision (relaxed eye), the image is formed at infinity. Hence the magnifying power of Gallilean telescope $ =\frac{f _{o}}{f _{e}}=\frac{200}{2}=100 $ .



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