When you stop at a railroad crossing at night, instead of correctly perceiving two red lights that flash alternately you may perceive a single red light that moves back and forth from left to right. This is an example of ________.
A) stroboscopic motion
B) the autokinetic illusion
C) the phi phenomenon
D) the Muller-Lyer illusion

Question

Quizplus · Accepted Answer

The phi phenomenon is the optical illusion of perceiving continuous motion between separate objects viewed rapidly in succession, such as the alternating red lights appearing as a single moving light.

When You Stop at a Railroad Crossing at Night, Instead