(a) Explain what is meant by a virtual, magnified image. (b) Draw a ray diagram to show the formation of a virtual magnified image of an object by a convex lens. In your diagram, the position of object and image with respect to the principal focus should be shown clearly. (c) Three convex lenses are available having focal lengths of 4 cm, 40 cm and 4 m respectively. Which one would you choose as a magnifying glass and why ?
Make labelled ray diagrams to illustrate the formation of : (a) a real image by a converging mirror. (b) a virtual image by a converging mirror. Mark clearly the pole, focus, centre of curvature and position of object in each case.