What type of lens is shown in the diagram on the right ? What will happen to the parallel rays of light? Show by completing the ray diagram.

Describe with the help of a ray-diagram, the size, nature and position of the image formed by a convex lens when an object is placed beyond 2f in front of the lens.

Describe with the help of a ray diagram the nature, size and position of the image formed when an object is placed at infinity (considerable distance) in front of a convex lens. State three characteristics of the image so formed.

Your eye contains a convex lens. Why is it unwise to look at the sun?

Where the object must be placed for the image formed by a converging lens to be:

(a) Real, inverted and smaller than the object?

(b) Real, inverted and same size as the object?

(c) Real, inverted and larger than the object?

(D) Virtual, upright and larger than the object?