Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436
Email flinn@flinnsci.com

Benham’s Disk Optical Illusion

firewatch

Publication 10655

Price: FREE

Display the colors of the rainbow on a rotating black and white disk.