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

The geometrical centre of a spherical mirror

Define principal axis of a spherical mirror.

The geometric centre of a spherical mirror is called

It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm. (i) What should be the range of distance of an object placed in front of mirror ? (ii) Will the image be smaller or large than the object ? Draw a ray diagram to show the formation of image in this case. (iii) Where will the image of this object be, if it is placed 24 cm in front of the mirror ? Draw a ray diagram for this situation also to justify your answer. Show the positions of the pole, the principal focus and the centre of curvature in the above ray diagrams.

An imaginary line passing through the pole and the centre of curvature of the spherical mirror

A ray of light travelling parallel to the principal axis, passes through the ......... (principal focus/centre of curvature) after reflection, in case of a concave mirror.

Define: Radius of curvature and centre of curvature

Define the principal focus of a concave mirror.

An imaginary line passing through the pole and the centre of curvature of a spherical mirror is called the _____

An object is between the principal focus and the centre of curvature of a concave mirror. The image formed is real and :