A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
R- Ra Rd Re Rg Rh Ri Rm Ro Rp Rs Ru

reflectance

[physics] The proportion of incident radiant energy that is reflected by a surface. Reflectance varies according to the wavelengths of the incident radiant energy and the color and composition of the surface.