Question

Four lenses having the focal length of +15 cm, +20 cm, +150 cm and +250 cm respectively
are provided to make an astronomical telescope. Then, focal length of the eye piece to produce
the largest magnification should be
(1) 250 cm
(2) 150 cm​

Answer 1

Answer:

In case of astronomical telescope, magnification =

f

e

f

o

For maximum magnification, f

e

should be least. So, f

e

should be 150 cm.

Explanation:

150

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