Reflection is not just a property of light, but of all electromagnetic waves, given a suitable reflective surface. The angle at which light reflects from a surface is equal to the angle at which it strikes the surface (angle of incidence). These angles are measured from the normal to the surface. Reflection is widely used in our society.
These slides outline the law of reflection and a number of applications for different surfaces (concave, convex, plane, ionosphere, fibre optic cables).