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When light from a lamp reflects off of a surface, it creates an image of the lamp that is known as reflection. The angle at which light strikes a surface, or the angle of incidence, is equal to the angle at which that light reflects off that surface, or the angle of reflection. The incident light's colour will match that of the reflected light. The incident light intensity multiplied by the surface's reflectivity will determine the intensity of the light that is reflected. How much light bounces off a surface is determined by its reflectivity. A surface that is totally smooth will have a reflectivity of 1, which indicates that all light striking it will be reflected. Lower reflectivity on a rough surface means that some light will be absorbed or scattered.
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