Optics Question 420

Question: Four lenses of focal length + 15 cm, + 20cm, + 150cm and + 250 cm are available for making an astronomical telescope. To produce the largest magnification, the focal length of the eye-piece should be

[CPMT 2001; AIIMS 2001]

Options:

A) + 15 cm

B) + 20 cm

C) +150 cm

D) + 250 cm

Show Answer

Answer:

Correct Answer: A

Solution:

For largest magnification focal length of eye lens should be least.



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