The Ponzo illusion occurs when ____.
A) a line with arrows extending away from the line appears longer than when the arrows extend inward
B) an image that is farther away appears smaller than an equal size image that appears closer.
C) lines of equal length that lie across converging lines appear to be unequal in length
D) a circular pattern of lines and geometric shapes appears to move when one's gaze shifts from the center to the outside of the image

Question

Quizplus · Accepted Answer

The Ponzo illusion is an optical illusion in which lines of equal length that are positioned above converging lines appear to be of unequal length. This illusion occurs because the brain interprets the converging lines as if they were parallel lines receding into the distance. As a result, the brain assumes that the line positioned higher up must be farther away, and therefore must be longer.

The Ponzo Illusion Occurs When ____