The focal length of the objective lens of a telescope is 50
cm If the magnification of the telescope is 25, then the
focal length of the eye-piece is

The focal length of objective lens of astronomical telescope is

The focal length of the objective of an astronomical telescope is 1.0 m. If the magnifying power of the telescope is 20, find the focal length of the eyepiece and the length of the telescope for the relaxed eye.

The focal length of the objective of a telescope is 60 cm. To obtain a magnification of 20, the focal length of the eye-piece should be :

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

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 telescope has magnification 5 and length of tube 60cm then the focal length of eye piece is–

A telescope has magnification 5 and length of tube 60cm then the focal length of eye piece is–