GENERAL KNOWLEDGE

Detailed explanation-1: -A convex lens is also known as the converging lens as the light rays bend inwards and converge at a point which is known as focal length. On the other hand, the concave lens is also known as a diverging lens because it bends the parallel light rays outward and diverges them at the focal point.

Detailed explanation-2: -Concave means curving inward-like the shape of the inside of a bowl. Convex means curving outward-like the shape of the outside of a contact lens.

Detailed explanation-3: -Microscopes use a convex lens to generate extremely magnified images of very small objects. Simple microscopes mostly consist of three lenses. The lens at the end of the simple microscope produces an inverted and magnified image.