bikonvekslääts

A bikonvekslääts, also known as a biconvex lens, is a convex lens that is curved outward on both sides. This shape causes parallel rays of light to converge at a focal point. Biconvex lenses are one of the simplest and most common types of lenses used in optics.

The focal length of a biconvex lens depends on its refractive index and the radii of curvature of its two surfaces. A higher refractive index or shorter radii of curvature result in a shorter focal length. These lenses are used in a wide variety of applications, including magnifying glasses, cameras, telescopes, and microscopes. They are also fundamental components in eyeglasses designed to correct hyperopia (farsightedness). The converging nature of the biconvex lens allows it to form real or virtual images depending on the object's position relative to its focal point.