Question

State the laws that are followed when light is reflected by spherical mirrors.

Answer 1

Basic laws followed by reflection of light rays from mirrors. A light ray parallel to principal axis passes through focus or seem to diverge from it (for convex) after reflection.

Answer 2

For convex mirror:
An incident ray which is parallel to the principal axis is reflected as if it came from the virtual focus  of the mirror.
An incident ray which is directed towards the virtual focus  of the mirror is reflected parallel to the principal axis.
An incident ray which is directed towards the centre of curvature  of the mirror is reflected back along its own path (since it is normally incident on the mirror).
An incident ray which strikes the mirror at its vertex  is reflected such that its angle of incidence with respect to the principal axis is equal to its angle of reflection.
For concave mirror:
Any incident ray traveling parallel to the principal axis on the way to the mirror will pass through the focal point upon reflection.
Any incident ray passing through the focal point on the way to the mirror will travel parallel to the principal axis upon reflection.