PURPOSE: Demonstrate perception of color due to periodic excitation of the eye.
DESCRIPTION: A disc contains half black and half white fields with various sets of azimuthal black lines on the white field. Rotating the disc a few times per second creates circles which appear to have various mild coloration, from greens to browns to blues. Rotating in the opposite direction changes the colors.
REFERENCES: (PIRA 6J11.11)
EQUIPMENT: Black and white discs with various azimuthal patterns.
SETUP TIME: None.
Go back to Lecture-Demonstration Home Page.