What is magnification of a lens?

A telescope has focal elngth of objective and eyepiece as 200 cm and 5 cm respectively.what is magnification of telescope?

What is th magnification produced by a single convex lens used as simple microscope in normal use?

A card sheet divided into squares each of size 1 mm^2 is being viewed at a distance of 9 cm through a magnifying glass (a converging lens focal length 10 cm) held close to the eye. What is the magnification produced by the lens? How much is the area of each square in the virtual image?

Define magnification of spherical mirror. What is the magnification produced in a plane mirror?

A giant refracting telescope at an observatory has an objective lens of focal length 15m. If an eyepiece of focal length 1.0cm is used, what is the angular magnification of the telescope?

An astronomical telescope has an objective lens of focal length 20 m and eyepiece of focal length 1 cm. Find the angular magnification of the telescope.

What is meant by linear magnification of a spherical mirror? Derive expressions for it.