4 Geometry of
reflection of an incident ray on
(a) concave spherical mirror,
and (b) convex spherical mirror FIGURE 9 5 Ray diagram for image
formation by a concave mirror Rationalised 2023-24
Ray Optics and
Optical Instruments
225
We now derive the mirror equation or the relation between the object
distance (u), image distance (v) and the focal length ( f )