U-V DIAGRAM FOR CONVEX LENS

U-V DIAGRAM FOR CONAVE MIRROR

CONCAVE & CONVEX LENS

a) Explain with the help of a diagram, why the concave lens is also called a diverging lens. b) Define the principle focus of a convex lens.

What is a lens? Distinguish between a convex lens and a concave lens. Which of the two is a converging lens: convex and lens or concave lens?