On Vision and Colors tried to demonstrate physiologically that color is "specially modified activity of the retina." The initial basis for Schopenhauer's color theory comes from Goethe's chapter on physiological colors, which discusses three principal pairs of contrasting colors: red/green, orange/blue, and yellow/violet. This is in contrast to the customary emphasis on Newton's seven colors of the Newtonian spectrum. In accordance with Aristotle, Schopenhauer considered that colors arise by the mixture of shadowy, cloudy darkness with light. With white and black at each extreme of the scale, colors are arranged in a series according to the mathematical ratio between the proportions of light and
Venous translucence tonality with the change in source direction. A shade with the change of source direction arises. It is known that the refraction index changes in agreement with the spectrum of transmitted light; when the white light is projected and finds an obstacle, it becomes separated into the three elementary colors (red, blue and green). Light during translumination may have greater dispersion or reflection, depending on how the source is placed on the examined area. This handling may improve or degrade the image, depending on the examiner's experience. Skin is opaque to light. In physics light reception, heat or other type