State one practical application each of the use of such a lens with the object in position (i) and (ii).

An object placed 4 cm in front of a converging lens produces a real image 12 cm from the lens.

(a) What is the magnification of the image?

(b) What is the focal length of the lens?

(c) Draw a ray diagram to show the formation of

Image. Mark clearly F and 2F in the diagram.

An object 2 cm tall stands on the principal axis of a converging lens of focal length 8 cm. Find the position, nature and size of the image formed if the object is:

(i) 12 cm from the lens

(ii) 6 cm from the lens

An object 3 cm high is placed 24 cm away from a convex lens of focal length 8 cm. Find by calculations, the position, height and nature of the image.

If the object is moved to a point only 3 cm away from the lens, what are the new position, height and nature of the image?