Benham's top

（重定向自Benham disk）

Animation

Seizure warning

Benham's top, also called Benham's disk, is named after the English newspaper-man and 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 (PIFCs), are visible at different places on the disk. Not everyone sees the same colors. Benham was inspired to propagate the Fechner color effect through his top after his correspondence with Dr. Gustav Theodor Fechner, who had observed and demonstrated the said effect.

单词	Benham disk
释义	Benham disk 英语百科 Benham's top （重定向自Benham disk） Animation Seizure warning Benham's top, also called Benham's disk, is named after the English newspaper-man and 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 (PIFCs), are visible at different places on the disk. Not everyone sees the same colors. Benham was inspired to propagate the Fechner color effect through his top after his correspondence with Dr. Gustav Theodor Fechner, who had observed and demonstrated the said effect.
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