5. For a converging lens of focal length f, where would you place the object to obtain an image as far away from the lens as possible? How large would the image be?

* 32. Use ray diagrams to locate the images of the following objects: (a) an object that is 10 cm from a convex lens of +15-cm focal length and (b) an object that is 10 cm from a concave lens of -15-cm focal length. (c) Calculate the image locations for parts (a) and (b) using the thin lens equation. Check for consistency.

3. Two converging lenses above are placed 20.0 cm apart, both with focal lengths of 10.0 cm. A candle is 30 cm away from the first lens. By means of a neat ray tracing, locate the final image formed by the combination of the two lenses. b) Use mathematics to fully describe the image created by the lenses.

6. A 2.0 cm tall object is 15 cm in front of a converging lens that has a 20 cm focallength.(a) Use ray tracing to find the position and height of the image. To do this accurately, use a ruler or a paper with a grid. Determine the image distance and imageheight by making measurements on your diagram.(b) Calculate the image position and height. Compare with your ray-tracing answers in part a.