| Popis: |
This chapter presents a brief history of the Ames window illusion, in which a trapezoid with its long and short sides in a vertical position rotates continuously in the same direction about a vertical axis. It creates the illusion of oscillating back and forth. An explanation is offered that is based on humans’ tendency to perceive a trapezoid as a slanted rectangle; according to this explanation, when the long base of the trapezoid is behind the short base, viewers perceive it to be in front, thus reversing depth and, consequently, reversing the direction of rotation. The chapter tries to see this illusion in a broader perspective and includes many compelling variations of the Ames window illusion. |
