Zoom Lens Consider the simple model of the zoom lens shown in Fig. 34.43a The converging lens has focal length f1, = 12cm, and the diverging lens has focal length f1 = - 12cm. The lenses are separated by 4 cm as shown in Fig. 34.43a.
(a) For a distant object, where is the image of the converging lens?
(b) The image of the converging lens serves as the object for the diverging lens. What is the object distance for the diverging lens?
(c) Where is the final image? Compare your answer to Fig. 34.43a.
(d) Repeat parts (a), (b), and (c) for the situation shown in Fig. 34.43b, in which the lenses are separated by 8cm.