CBSE Class 10 Science 2020 · Paper 31/5/1 · Question 22

(a) Convex mirror: the ray parallel to the principal axis, after reflection, appears to diverge from the principal focus F behind the mirror; the reflected ray is drawn going away from the mirror, and its dashed backward extension passes through F. (b) Concave mirror: the ray passing through the principal focus F, after reflection, travels parallel to the principal axis. (c) Convex mirror: the ray striking the pole P obliquely is reflected obliquely on the other side of the principal axis, making an equal angle with it, because the principal axis is the normal at the pole ($\angle i=\angle r$). Each ray is drawn with an arrow showing its direction.