Influences on color quality such as absorption, reflection, haze,
scattering, interference, dispersion, and fluorescence must be considered
subject, is not evenly absorbed at all wavelengths.
If the subject did
absorb all wavelengths equally, we would have to illuminate the subject with
subject is dependent on its absorption and reflection characteristics in
relation to the various wavelengths present in illumination.
contacted by the incident light ray is smooth and polished, the
surface reflects the light at the same angle to the surface as the
incident light. The path of the light reflected from the surface
forms an angle exactly equal to the one formed by its path in reaching
angle of reflection, which is a universal characteristic of specular light.
If the surface is rough and irregular, the incident light rays are