Reflection of light is the bouncing back of light when it hits a smooth surface like a mirror. When a beam of light strikes a surface, it reflects in such a way that the angle at which it hits the surface (called the angle of incidence) is equal to the angle at which it bounces off (called the angle of reflection). This rule is known as the Law of Reflection. Smooth and shiny surfaces, like mirrors or still water, reflect light well and can form clear images. Rough surfaces also reflect light, but in many directions, which is why they do not form clear reflections.