Define (a) centre of curvature (b) radius of curvature (c) pole (d) principal axis, and (e) aperture, of a spherical mirror with the help of a labelled diagram.

Q.

Define the terms given below related to the spherical mirror.​

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Q.

Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror.

Q. In the case of a mirror, match the items in column A with those in column B.
A B
1. Centre of curvature (a) centre of the mirror
2. Focus (b) centre of the sphere of which the mirror is a part
3. Radius of curvature (c) point through which all the incident rays parallel to principal axis pass after reflection
4. Principal axis (d) line joining the pole and focus
5. Pole (e) distance between pole and centre of curvature

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

Q.

Explain the following terms :

Pole, Centre of curvature, Radius of curvature, Principal axis.

Show them on separate diagrams for each of the concave and convex mirrors.