What is bi convex?

Bi-convex refers to a lens that has two convex surfaces, meaning that both sides of the lens are curved outwards. This type of lens is used in many everyday applications, such as eyeglasses or magnifying glasses. Bi-convex lenses can focus and converge light rays, making them useful for correcting vision problems or as part of optical instruments. The shape of the lens allows for a versatile range of focal points and magnification, which is important for many different applications in physics, astronomy, and engineering. Overall, bi-convex lenses are an important tool in the world of optics and can be found in many different industries and technological applications.