reflectivity, <of a material>
reflectance of a layer of a material that is of sufficient thickness so that there is no change in reflectance with increase in thickness
Note 1 to entry: The reflectivity has unit one.
Note 2 to entry: This entry was numbered 845-04-86 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-1067 in CIE S 017:2011.