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Centre of Curvature of Spherical Mirrors

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The centre of curvature

In front of the mirror

The radius of curvature of the mirror

The principal axis Signup and view all the answers

It represents the centre of curvature Signup and view all the answers

Normal to the mirror at its pole Signup and view all the answers

The reflecting surface of a spherical mirror forms part of a sphere, with a centre called the centre of curvature (C).
The centre of curvature lies outside the reflecting surface, not being part of the mirror itself.
In concave mirrors, the centre of curvature is in front of the mirror, while in convex mirrors, it is behind the mirror.

The radius of the sphere forming the reflecting surface of a spherical mirror is called the radius of curvature (R).
The distance PC is equal to the radius of curvature.

A straight line passing through the pole and the centre of curvature of a spherical mirror is called the principal axis.
The principal axis is normal to the mirror at its pole.