Which are the two convenient rays that are chosen to construct the image by a spherical mirror for a given object ? Explain with the help of suitable ray diagrams.
Two convenient rays chosen to construct the image by a spherical mirror are :
(i) A ray parallel to the principal axis which after reflection passes or appears to pass through focus.
(ii) A ray passing through the center of curvature or appears to pass through center of curvature which retraces its path after reflection.