Define lateral magnification.

For driving a car,what type of mirror would you prefer to see the traffic at your back?

$A$ girl was playing with a thin beam of light from her laser torch by directing it from different directions on a convex lens held vertically. She was surprised to see that in a particular direction the beam of light continues to move along the same direction after passing through the lens. State the reason for this observation.

Under which of the following conditions can a concave mirror form an image larger than the actual object?

Describe the different cases of image formation by a convex lens. Provide the ray diagram for each case.

The diagram given below shows an object $O$ and its image $I.$ Copy the diagram and draw suitable rays to locate the lens and its focus. Name the type of lens in this case.