Draw a labelled ray diagram showing the formation of an image by a refracting telescope when the final image lies at infinity..

(a) Draw a ray diagram showing the formation of image by a reflecting telescope (b) Write two advantages of a reflacting telescope over a refracting telescope .

(a) Draw a labelled ray diagram to shwo the formation of image in a convex mirror when the object is at infinity. Mark clearly the pole and focus of the mirror in the diagram. (b) State three characteristics of the image formed in this case. ( c) Draw diagram to show how a convex mirror can be used to give a large field of view.

Draw a ray diagram to show image formation by a concave lens.

Draw a labelled ray diagram for the formation of image by a convex lens of focal length 15 cm when the object is placed at a distance of 25 cm from the lens. Determine the size of the image formed, if size of the object is 4 cm.