why convex lens is known as converging lens
Lens (optics) If the lens is biconvex or plano-convex, a collimated beam of light passing through the lens converges to a spot (a focus) behind the lens. In this case, the lens is called a positive or converging lens. The distance from the lens to the spot is the focal length of the lens, which is commonly abbreviated f in diagrams and equations. An extended hemispherical lens is a special type of plano-convex lens, in which the lens's curved surface is a full hemisphere and the lens is much thicker than the radius of curvature.
Capability Maturity Model Integration Maturity Level 5 - Optimizing
Z-transform The Z-transform can be defined as either a one-sided or two-sided transform.[7]
Alonso Álvarez de Pineda