A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close
Channel: Doubtnut
Date: 2020-01-26

A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with one another. a) What is the power of this combination? b) What is the focal length of this combination? c) Is the combinatioin converging or diverging?