| http://www.w3.org/ns/prov#value | - In the special case in which light is reflected off an optically smooth surface e.g. a mirror surface???here it is more appropriate to think of the light as being redirected rather than scattered backwards, with the redirection process being strictly governed by the well known classical law of geometrical reflection, which is that the angles of incidence and reflection are equal ??I=??r (FIG. 1).
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