Question

Which lens is converging:

A concave-convex lens or a convex-concave lens?

• A. A concave-convex lens
• B. A convex-concave lens
• C. both A & B
• D. None of them

Answer 1

The correct option is A A concave-convex lens

A concave lens diverges and convex lens converges. A concave-convex lens will be such that the ray of light will first fall on the concave face and diverges. This diverged ray strikes convex surface and the converges, thereby finally leading to convergence. It would be vice-versa in case of convex-concave lens where first convergence and then divergence would cause overall divergence.