A Galilean telescope of `10`-fold  magnification has the length of `45 cm` when adjusted to infinity
Channel: Doubtnut
Date: 2020-08-16

A Galilean telescope of `10`-fold  magnification has the length of `45 cm` when adjusted to infinity. Determine :  (a) the focal lengths of the telescope's objective and ocular,  (b) by what distance the ocualr should be displaced to adjust the telescope to the distance of `50 m.`