The centre of the sphere of which the spherical mirror forms a part is called ____________.

What is meant by the pole of a spherical mirror?

Correct relation between radius of curvature($R$) and Focal length ($F$) of a spherical mirror is:

If a mirror forms erect image for objects placed between pole and focus, and it forms real-inverted image for object placed anywhere between focus and infinity, then the mirror is:

Establish the relation between the radius of curvature $R$ and focal length $f$ of the spherical concave mirror.

Write the sign convention for reflection by spherical mirrors.

What will be the angle of incidence when a ray of light passes through the centre of curvature of a concave mirror?

A student holding a mirror in his hand, directed the reflecting surface of the mirror towards the Sun. He then directed the reflected light on to a sheet of paper held close to the mirror.

Will he be able to determine the approximate value of focal length of this mirror from this activity ? Give reason and draw ray diagram to justify your answer in this case.