Which of the following diagrams shows the ray of light refracted correctly?

If a ray of light is incident on a plane mirror such that it makes an angle of 30with the mirror, then will be the angle of reflection?

A communications satellite in orbit sends a parallel beam of signals down to earth. If these signals obey the same laws of reflection as light and are to be focussed onto a small receiving aerial, what should be the best shape of the metal 'dish' used to collect them?

List two possible ways in which a concave mirror can produce a magnified image of an object placed in front of it. State the difference, if any, between these two images.

With the help of a ray diagram explain why a concave lens diverges the rays of a parallel beam of light.

A pencil when dipped in water in a glass tumbler appears to be bent at the interface of air and water. Will the pencil appear to be bent to the same extent, if instead of water we use liquids like, kerosene or turpentine. Support your answer with reason.

Does the incident and emergent ray coincide in the process of refraction through glass slab? Give reason.

At what distance from a converging lens of focal length 12cm must an object be placed in order that an image of magnification 1 will be produced?

State any four characteristics of the image of an object formed by a plane mirror.