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Magnification produced by a spherical mirror gives the relative extent to
which the image of an object is magnified with respect to the object size.
Magnification is expressed as the ratio of the height of the image to the height
of the object.
It is usually represented by the letter m.
If h is the height of the object and h' is the height of the image then the
magnification m produced by a spherical mirror can be written as
The magnification m is also related to the object distance (u) and image
distance (v). It can be expressed as:
The negative sign in the value of the magnification indicates that the image is
real. A positive sign in the value of the magnification indicates that the image
is virtual. | 
