Sign Convention for Reflection by Spherical Mirrors       The new Cartesian sign convention is used for measuring the various distances in the ray-diagrams of spherical mirrors.     According to the new Cartesian sign convention (figure 1) :     (i) The pole ‘P’ of the mirror is taken as the origin and the principal axis of the mirror…

Some Important Terms Related to Spherical Mirrors       The important terms related to spherical mirrors are –   CENTRE OF CURVATURE (C)       The centre of curvature of a spherical mirror is the centre of the imaginary hollow sphere of glass, of which the spherical mirror is a part. The centre of curvature is usually…