A simple astronomical telescope is designed using two convex lenses of focal lengths 1 m and
Channel: Doubtnut
Date: 2021-11-08

A simple astronomical telescope is designed using two convex lenses of focal lengths 1 m and `0.05`m. Find the magnifying power when the instrument is used to view a distant object if the final image is formed (a) at a great distance, (b) at a distance of `0.25`m from the eye-piece.