A diverging mirror of radius of curvature 40cm forms an image which is half the height of the object. Find the object and image positions.

The shiny outer surface of a hollow sphere of aluminium of radius 50cm is to be used as a mirror:

1. What will be the focal length of this mirror?
2. Which type of spherical mirror will it provide?
3. State whether this spherical mirror will diverge or converge light rays.

A shop security mirror 5.0m from certain items displayed in the shop produces one-tenth magnification.

1. What is the type of mirror?
2. What is the radius of curvature of the mirror?

Describe an activity to show that the colours of white light splinted by a glass prism can be recombined to get white light by another identical glass prism. AIso draw ray diagram to show the recombination of the spectrum of white light.

Make labelled ray diagrams to illustrate the formation of:

1. A real image by a converging mirror.
2. A virtual image by a converging mirror.

Mark clearly the pole, focus, centre of curvature and position of object in each case.

With the help of a diagram, explain why the image of an object viewed through a concave lens appears smaller and closer than the object.

What is the difference between regular reflection of light and diffuse reflection of light? What type of reflection of light takes place from:

1. A cinema screen.
2. A plane mirror.
3. A cardboard.
4. Still water surface of a lake

Give two uses of concave mirrors. Explain why you would choose concave mirrors for these uses.