Benham's Top

Benham's top is one of many classic examples of subjective colors.   If you click the button to spin the black and white circular disk, you should be able to see faint colors in the position of the arcs. 

Please click the button to spin

  Java support is needed to run this calculator

The following version needs a fast computer and the latest Java 2

The following version was adapted in response to Josef K Nagler's suggestions. 

A smaller version:

(Originally Developed in November 1999)