Question

two convex lens of focal length 20cm each are placed coaxially with a separation of 60cm between them. The distance of image formed at a distance object by the compilation from rear lens is​

Answer 1

Answer:

Thus, the equivalent divergent lens should be placed at a distance of 60cm to the right of the second lens. The final image is formed at the focus of this divergent lens, i.e., 20cm of the left of it.