Glossary
Abney effect A sensory effect, according to which hue sensations caused by color stimuli of a spectral light increasingly diluted with an achromatic stimulus, as well as by corresponding object color stimuli, in most cases, do not remain constant.
Absorbance A measure of the absorption of light by a colorant; reciprocal of transmittance or reflectance.
Absorption The transfer of energy from photons to matter.
Achromatic Neutral, possessing no hue and chroma or colorfulness.
Adaptation The adjustment of response to wide ranges of stimuli. There are chromatic and brightness/lightness adaptation.
Afterimage A visual image experienced in the same visual field after its original stimulus has ended.
Aim color A psychophysical color specification for a color chip; typically in a systematic collection.
Amacrine cells These cells modify the output of cone cells in the retina on the way to ganglion cells and the optic nerve spanning from the eye to the visual centers of the brain.
Angle of incidence The angle at which light rays impinge on a surface, expressed with respect to a line orthogonal to the surface.
Angle of viewing The polar angle describing the difference between the lines connecting the retina and the outer limits of an observed patch, expressed in degrees. It is a function of patch size and distance from the eye.
Attention The concentration of the conscious mind on specific sights, sounds, or thoughts.
Beer–Lambert–Bouguer law A law that relates transmission of light, ...
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