Question

A lens x has a focal length of 20cm and a lens y has a focal length of 40cm which lens would you select to obtain a more convergent beam of light​

Answer 1

Answer:

A convex lens of focal length A and a concave lens of focal length B are placed in contact. The focal length of the combination is. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.