ABSTRACT
Light reflection is a redirection of light. Common examples include the reflection of an image by a mirror or by a smooth water surface. The direction of the reflected light is determined by the laws of reflection as following. Incident and reflected light beams as well as the normal of the reflecting interface at the point of incident are in one plane. The angle between incident light beam and layer normal is the same as the angle between reflected light beam and layer normal but both are on opposite sides of the layer normal. Smooth interfaces lead to specular (mirror-like) reflection while rough interfaces like in polycrystalline materials lead to diffuse reflection.
