The diverging lens in part (a) is replaced by a converging lens also of focal length 100mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).

A lens of focal length 20cm is used to produce a ten times magnified image of a film slide on a screen. How far must the slide be placed from the lens ?

Draw the ray diagram and also state the position, the relative size and the nature of image formed by a concave mirror when the object is placed at the centre of curvature of the mirror.

Draw ray-diagrams to show the formation of images when the object is placed in front of a concave mirror (converging mirror):

1. Between its pole and focus.
2. Between its centre of curvature and focus Describe the nature, size and position of the image formed in each case.

An object of height 6 cm is placed perpendicular to the principal axis of a concave lens of focal length 5 cm. use lens formula to determine the position, size and nature of the image if the distance of the object from the lens is 10 cm.

At what distance from a concave mirror of focal length 10cm should an object 2cm long be placed in order to get an erect image 6cm tall?

A man stands 10m in front of a large plane mirror. How far must the walk before he is 5m away from his image?

Draw labelled ray diagrams to show the formation of images in cases (i) and (ii)above (The diagrams may not be according to scale).

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?

A spherical mirror produces an image of magnification -1.0 on a screen placed at a distance of 30 cm from the pole of the mirror.

1. Write the type of mirror in this case.
2. What is the focal length of the mirror?
3. What is the nature of the image formed?
4. Draw the ray diagram to show the image formation in this case.