Question

Galileo's telescope [ he called it a cannocchiale ('eye tube')] is sketched in Fig. 1.97. As in the telescope the second focus of the objective coincides with the first focus of the ocular. However, the ocular is a diverging lens. Draw a ray diagram for the Galilean telescope. Is the image erect or inverted ? real or virtual ?

Answer 1

From image we can see that formed image $P^{\prime \prime }{Q}^{\prime \prime }$ is erect and virtual.