An object is 15 cm from a converging lens of focal length 15 cm. A second positive lens of focal length 15 cm is 20 cm from the first lens. Where is the final image (s)?
Since 1/15+1/s=1/15 by the thin-lens equation, is there an image formed?
Since 1/15+1/s=1/15 by the thin-lens equation, is there an image formed?