The magnifying power of an astronomical telescope for normal vision is 10 . The focal length of the objective is 20 cm . What will be the magnifying power for focussing the final image formed at a distance of 25 cm from the eyepiece ?

Magnifying power of an astronomical telescope for normal adiustment is 10 and length of the teescope is 110 cm. Magnifying power of the same telescope when the image is formed at the near point is

The magnifying power of an astronomical telescope for normal adjustment is 10 and the length of the telescope is 110cm..Find the magnifying power of the telescope when the image is formed at the least distance of distinct vision for normal eye.

An astronomical telescope has a magnifying power 10. The focal length of eyepiece is 20 cm . The focal length of objective is