‘‘A concave mirror of focal length 15cm can form a magnified erect as well as inverted image of an object placed in front of it.’’ Justify this statement stating the position of the object with respect to the pole of the mirror in both cases for obtaining the images.

How will you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them?

An object is placed at a distance of 6cm from a convex mirror of focal length 12cm. Find the position and nature of the image.

Explain with the help of a diagram, why the convex lens is also called a converging lens.

What are the important differences between looking at a photograph of your face and looking at yourself in a plane mirror?

Draw a ray diagram to show the formation of a real magnified image by a convex lens. (In your sketch the position of object and image with respect to the principal focus of lens should be shown clearly).

With the help of a diagram, show how when light falls obliquely on the side of a rectangular glass slab the emergent ray is parallel to the incident ray.

What is the difference between a real image and a virtual image? Give one example of each type of image.

An extended object in the form of an arrow pointing upward has been placed in front of plane mirror. Draw a labelled ray-diagram to show the formation of its image.

List four characteristics of the images formed by plane mirrors.