Question

A convex lens A of focal length 40 cm and a concave lens B of focal length 25 cm are kept
along the same axis with a distance 'd' between them .If a parallel beam of light falling on A
leaves B as a parallel beam , then "d" is equal to
1) 25cm
2) 15cm 3) 65cm
4) 40cm​

Answer 1

Answer:dtfyhuyhdUJAHU

Explanation: