1) A converging lens is used to produce an image on a screen. If the focal length of the lens is 10 cm, how far from the object should the lens be placed from the converging lens to form a clear enlarged image on the screen?

2) A lens is used to form an image of an object as shown below.

What is the likely application this lens is being used for?

3) A converging lens has a focal length of 20.0 cm. If  an object is placed 50.0 cm from the optical centre of the lens, how far will the image be from the optical centre of the lens?

4) The diagram below shows object O, the image I formed from the light passing through lens L.

Which distance is the image height?

5) The diagram below shows a convex lens L with its principal foci at F.

If an object at position X is moved further away from the lens to position Y, the image