Phi Phenomenon
The beta phenomenon is often confused with the phi phenomenon but they are quite different physiologically. The phi phenomenon can be considered to be an apparent movement caused by luminous impulses in sequence, (that is to say, it is lights going on and off at regular intervals), whereas the beta movement is an apparent movement caused by lights that do not move, but seem to.
Read more about this topic: Beta Movement
Famous quotes containing the words phi and/or phenomenon:
“Adolescents have the right to be themselves. The fact that you were the belle of the ball, the captain of the lacrosse team, the president of your senior class, Phi Beta Kappa, or a political activist doesn’t mean that your teenager will be or should be the same....Likewise, the fact that you were a wallflower, uncoordinated, and a C student shouldn’t mean that you push your child to be everything you were not.”
—Laurence Steinberg (20th century)
“When the ice is covered with snow, I do not suspect the wealth under my feet; that there is as good as a mine under me wherever I go. How many pickerel are poised on easy fin fathoms below the loaded wain! The revolution of the seasons must be a curious phenomenon to them. At length the sun and wind brush aside their curtain, and they see the heavens again.”
—Henry David Thoreau (1817–1862)