Question

Explain rules for obtaining images formed by concave mirrors

Answer 1

A concave mirror can form a real and inverted image. when the object is placed very close to the mirror, the image formed is virtual, erect and magnified

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Answer 2

Rules for obtaining images formed by concave mirrors :-

Rule1: A ray of light which is parallel to the principal axis of a concave mirror passes through its focus after reflection from the mirror.

Rule2 : A ray of light passing through the centre of curvature of a concave mirror is reflected back along the same path (because it strikes the mirror normally or perpendicularly).

Rule3 : A ray of light passing through the focus of concave mirror becomes parallel to the principal Axis after reflection.

Rule4 : A ray of light which is incident at the pole of a concave mirror is reflected back making the same angle with the principal axis.