Question

In an astronomical telescope, the focal length of the objective lens is 100 cm and of eye-piece is 2 cm . The magnifying power of the telescope for the normal eye is
A. 50
B. 10
C. 100
D. `1/50`

Answer 1

Correct Answer - A
Magnification of astronomical telescope for normal eye is,
`m=-f_(o)/(f_(e))=-100/2=-50`