id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-5496		On Vision and Colours - Wikipedia			.html	text/html	6494	610	65	On Vision and Colors (originally translated as On Vision and Colours; German: Ueber das Sehn und die Farben) is a treatise[1] by Arthur Schopenhauer that was published in May 1816 when the author was 28 years old. Schopenhauer tried to demonstrate physiologically that color is "specially modified activity of the retina.[5]" 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. When the activity of the retina is divided, the part of the retinal activity that is inactive and not stimulated into color can be seen as the ghostly complementary afterimage, which he and Goethe call a (physiological) spectrum. Instead of Newton's division of sunshine into seven rays, Schopenhauer claimed that color was a division of the eye's retina into two complementary parts.	./cache/en-wikipedia-org-5496.html	./txt/en-wikipedia-org-5496.txt