A large concave mirror has a radius of curvature of 1.5m. A person stands 10m in front of the mirror. Where is the person’s image?

Describe with a suitable diagram, how a convex mirror diverges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of convex mirror in this diagram.

A star appears slightly higher (above) than its actual position in the sky illustrate it with the help of a labelled diagram.

Find the focal length of a lens of power – 2.0 D. What type of lens is this?

List four specific characteristics of the images of the objects formed by convex mirrors.

Name the type of mirrors used in the design of solar furnaces. Explain how high temperature is achieved by this device.

A doctor has prescribed a corrective lens of power, -1.5D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

A lens is cut into two equal halves: Along the principal axis.
What will be the focallength of each half?

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

1. Real, inverted and smaller than the object?
2. Real, inverted and same size as the object?
3. Real, inverted and larger than the object?
4. Virtual, upright and larger than the object?

What is the minimum number of rays required for locating the image formed by a concave mirror for an object. Draw a ray diagram to show the formation of a virtual image by a concave mirror.