approximation

Source: Wikipedia Understanding the Paraxial Approximation in Optics Paraxial Approximation in Optics Introduction In optics, the paraxial approximation is a valuable tool for simplifying calculations by assuming that the light’s propagation direction deviates only slightly from a beam axis. This approximation is widely used in both geometrical and wave optics. Paraxial Approximation in Geometrical Optics […]