Benham’s top is named after the English toymaker Charles Benham, who, in 1895, sold a top painted with the pattern shown. When the disk is spun, arcs of pale color — called Fechner colors or pattern induced flicker colors — are visible at different places on the disk. Not everyone sees the same colors. The phenomenon is not entirely understood. One possible reason people see colors may be that the color receptors in the human eye respond at different rates to red, green, and blue.
Benham’s top
