The rays, parallel to the principal axis, of a spherical mirror, actually meet at a point 20 cm distant from its pole. Identify the mirror and give its focal length.

An object is placed at a distance of $15 \mathrm{cm}$ in front of a Concave Mirror. If an image of its is formed at $30 \mathrm{cm}$ from the mirror, find the focal length of the mirror.

Observe the following diagram and answer the question given below

Explain why a ray of light passing through the centre of curvature of a concave mirror gets reflected back along the same path.

A concave mirror produces $3$ times enlarged image of an object placed $10 \mathrm{cm}$ in front of it. Calculate its radius of curvature.

Write the sign convention for reflection by spherical mirrors.

Draw a ray diagram to show the formation of an image when an object is placed between $\mathrm{F}$ and $\mathrm{P}$ of a concave mirror.

Why convex mirrors are used as rear-view mirrors in vehicles?

Draw a Ray diagram to show the formation of an image when the object is placed between the pole and the focus of a Concave Mirror.