The magnifying power of a telescope is 10. What would be its new magnifying power if the focal length of the objective is doubled and the focal length of the eyepiece is halved ?

To increase the magnifying power of telescope ( f_(o) = focal length of the objective and f_(e) = focal length of the eye lens)

(a) Draw a labelled diagram of an image of a distant object formed by a refracting astronomical telescope in normal adjustment. Write (do not derive) an expression for its magnifying power. (b) An aestronomical telescope set for normal adjustment has a magnifying power 10 . If the focal length of the objective is 1.20 m, what is the focal length of the eyepiece ?

If the focal length of the objective lens is increased then Magnifying power

An astronomical telescope has a length of 310 cm and a magnifying power of 30. The focal length of its objective is

An astronomical telescope has a magnifying power 10. The focal length of the eye piece is 20 cm. the focal length of the objective is -

If the focal length of objective lens is increased then magnifying power of the