Galileo?s first telescope used the arrangement shown in Fig. 31.36, with a double-concave eyepiece slightly before the

Question:

Galileo?s first telescope used the arrangement shown in Fig. 31.36, with a double-concave eyepiece slightly before the focus of the objective lens. Use ray tracing to show that this design gives an upright image, which makes the Galilean telescope useful in terrestrial observing.