(i) When a ray, passing through focus strikes concave or convex mirrors, the reflected ray will pass parallel to the principle axis. The size of image formed is same as the object, is placed at centre of curvature.
(ii) The ray of light going through focus of a convex mirror becomes parallel to the principal axis after reflection.
(iii) A ray of light which is incident at the pole of a convex mirror is reflected back making the same angle with the principal axis. Thus angle of incidence i is equal to the angle of reflection r.
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