Stationary lights on a neon sign blink sequentially and appear to move. This appearance is called the ________________?
Correct answer: C. phi-phenomenon
- A. Ponzo illusion
- B. Necker illusion
- C. phi-phenomenon
- D. induced movement effect
Explanation
The phi phenomenon is the perception of movement produced by stationary lights flashing in sequence, as in many signs. The apparent motion is created by the observer's perceptual system rather than by movement of the lights.
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