Draw ray diagrams showing the image formation by a convex mirror when an object is placed:
At finite distance from the mirror.

Refractive index of diamond with respect to glass is 1.6 and absolute refractive index of glass is 1.5. Find out the absolute refractive index of diamond.

Show by drawing a ray-diagram that the image of an object formed by a concave lens is virtual, erect and diminished.

An object is placed at a distance of 30cm in front of a convex mirror of focal length 15cm. Write four characteristics of the image formed by the mirror.

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.

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?

What do you mean by laterally inverted?

An object is placed just outside the principal focus of concave mirror. Draw a ray diagram to show how the image is formed, and describe its size, position and nature.

List four precautions which a student should observe while determining the focal length of a given convex lens by obtaining image of a distant object on a screen.