An optical illusion consisting of a spinnable top marked in black with the pattern shown above. When the wheel is spun (especially slowly),
the black broken lines appear as green, blue, and red colored bands.
The effect depends on the color of lighting. With blue light, there is only a silver effect. With red light, all colors appear.
Archimedes' Lab. "Optical Tops to Make." http://www.archimedes-lab.org/workshoptop.html.Cohen, J. and Gordon, D. A. "The Prevost-Fechner-Benham Subjective Colors."
Psycholog. Bull.46, 97-136, 1949.Festinger, L.; Allyn,
M. R.; and White, C. W. "The Perception of Color with Achromatic Stimulation."
Vision Res.11, 591-612, 1971.Fineman, M. The
Nature of Visual Illusion. New York: Dover, pp. 148-151, 1996.Kunsemüller,
J. Meyers
Lexikon der Technik und der exakten Naturwissenschaften, Bd. 1. A - E. Fischer
Taschenbuch Verlag, 1970.Trolland, T. L. "The Enigma of Color
Vision." Amer. J. Physiology2, 23-48, 1921.
