What is linear magnification produced by a lens? How is it related to object distance and image distance?

The linear magnification produced by a spherical mirror (with 'u' as object distance 'v' as image distance and 'f' as focal length) is

State the expression for linear magnification of a concave mirror in terms of object distance and image distance.

a. What is meant by magnification 'm' ? b. Give the mathematical relation. c. How is 'm' related to object distance and image distance ?

Answer the following questions : Express the magnification produced by a lens in terms of the focal length of the lens and the object distance the image distance.

For thin convex lens if magnification is one then object distance and image distances are .....