Reflection Of Light


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       A mirror formula may be defined as the formula which gives the relationship between the distance of image v, distance of object u, and the focal length of a mirror. It may be written as,

Mirror Formula

    where,   v = Distance of image from pole of mirror
                 u = Distance of object from pole of mirror
    and,       f = Focal length of the mirror

       The mirror formula is applicable both in spherical mirrors (concave mirrors and convex mirrors) and in plane mirrors.

Test Your Understanding and Answer These Questions:

  1. Define mirror formula.

  2. Derive mirror formula of a concave mirrors.

  3. How is mirror formula applicable in plane mirrors?