When a sparkler is twirled rapidly,people perceive a circle of light.This occurs because
A)the trail you see is caused by sparks left behind from the sparkler.
B)due to its differing wavelengths,the light from the sparkler continues to radiate for about a second after it goes out.
C)the length of iconic memory (the persistence of vision)is about a fraction of a second.
D)Gestalt principles work to complete the circle in our minds.

Question

Quizplus · Accepted Answer

The length of iconic memory, which is the visual memory that persists after a stimulus has been removed, is about a fraction of a second. This means that when a sparkler is twirled rapidly, the flashes of light produced by the sparks are perceived as a circle due to the persistence of vision. The brain processes the information from the visual stimuli and combines it to create the illusion of a continuous circle of light.

When a Sparkler Is Twirled Rapidly,people Perceive a Circle of Light.This