Theory
Surface gloss is considered to be the amount of incident light that is reflected at the specular reflectance angle of the mean of that surface. So, specular gloss is proportional to the reflectance of the surface.
The Fresnel formula gives the specular reflectance, for an unpolarized light of intensity, at angle of incidence, giving the intensity of specularly reflected beam of intensity, while the refractive index of the surface specimen is .
The Fresnel equation is given as follows :
Read more about this topic: Gloss (material Appearance)
Famous quotes containing the word theory:
“Won’t this whole instinct matter bear revision?
Won’t almost any theory bear revision?
To err is human, not to, animal.”
—Robert Frost (1874–1963)
“... the first reason for psychology’s failure to understand what people are and how they act, is that clinicians and psychiatrists, who are generally the theoreticians on these matters, have essentially made up myths without any evidence to support them; the second reason for psychology’s failure is that personality theory has looked for inner traits when it should have been looking for social context.”
—Naomi Weisstein (b. 1939)
“The theory of truth is a series of truisms.”
—J.L. (John Langshaw)