What is mirror formula used for:

Asked by Rahul Agarwal | 29th Jan, 2011, 12:03: PM

Expert Answer:


In a spherical mirror, the distance of the object from its pole is called the object distance (u). the distance of the image from the pole of the mirror is called the image distance (v). You already know that the distance of the principal focus from the pole is called the focal length (f). The relation between these three quantities is given by the mirror formula. The mirror formula  is


This formula holds good  for both concave and convex mirrors for all positions of the object.

Table Showing the Sign Convention

Answered by  | 29th Jan, 2011, 03:27: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.