Give definitions for the following concepts in relation to spherical mirrors:
(i) Pole
(ii) Centre of curvature
(iii) Principal axis
(iv) Principal focus

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Detailed Solution

Centre of curvature: It is the centre of the sphere of a glass of which the mirror is a part. The letter 𝐶 represents the centre of curvature.

The principal axis of a spherical mirror is the straight line joining the centre of curvature and the pole of the mirror.

Principal focus: The midpoint of 𝐶𝑃 is called focus (𝐹).

The pole of a spherical mirror is the centre of the reflecting surface of the spherical mirror.

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