Draw a ray diagram to show how a converging lens can form an image of the sum. Hence give a reason for the term 'burning glass' for a converging lens used in this manner.
The ray diagram shows the image of an object formed by a converging lens. What is the focal length of the lens?
A converging lens forms the image of an object placed in front of it, beyond 2F2 of the lens. (a) Where is the object placed? (b) Draw a ray diagram to show the formation of the image. (c) State three characteristics of the image.
Draw a ray diagram to show how a converging lens is used as a magnifying glass to observe a small object. Mark on your diagram the foci of the lens and the position of the eye.