What is biconvex lense?

A biconvex lens, also known as a convex-concave lens, is a lens with two convex surfaces that bulge outward in the middle and taper towards the edges. It is a type of lens commonly used in optics and has a positive or converging power, which means it converges the light rays that pass through it to form an image. The focal length of a biconvex lens is determined by its shape and refractive index and can be used to magnify or focus light. Biconvex lenses are widely used in eyeglasses, cameras, telescopes, microscopes, and other optical instruments. They can be made from various materials, including glass, plastic, and quartz.