Regular reflection light is light that is reflected off of a surface in an even, predictable pattern. This type of reflection is caused by the flat, regular surface of a material such as a mirror, a glossy paint, or a smooth, polished stone. The reflection is caused by the regular arrangement of the material’s surface molecules. The light is reflected according to the Law of Reflection, which states that the angle of incidence of the light is equal to the angle of reflection.