What is the minimum number of rays required for locating the image formed by a concave mirror for an object? Draw a ray diagram to show the formation of a virtual image by a concave mirror.

Which kind of mirror is used in the headlights of a car? Why is it used for this purpose?

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

With the help of a ray diagram, determine the position, nature and size of the image formed of an object placed at the centre of curvature of a concave mirror.

Describe with the help of a diagram, the nature, size and position of the image formed when an object is placed beyond the centre of curvature of a concave mirror.