1. an illusion of obvious motion observed whenever two lights flash off and on about 150 m apart from one another. The light seems to progress from one locale to the other. The is a type of beta movement. 2. a feeling of pure motion separate of any other traits of the stimulant, like its form.

PHI PHENOMENON: "The phi phenomenon is a common optical illusion presented on many math and science examinations."
Cite this page: N., Sam M.S., "PHI PHENOMENON," in, April 7, 2013, (accessed October 22, 2021).