Movies trick the eye into seeing smooth motion by flashing 24 still pictures every second. The reason this works is:
APictures join physically
BThe eye has a buffer like a computer
CPersistence of vision — an image lasts on the retina for about 1/16 s, so a sequence faster than 16 images per second is perceived as continuous motion
DLight becomes 'sticky' inside the eye
Answer & Solution
Correct answer: C. Persistence of vision — an image lasts on the retina for about 1/16 s, so a sequence faster than 16 images per second is perceived as continuous motion
Persistence of vision: a still image lingers on the retina for roughly 1/16th of a second after the source vanishes. If new images arrive faster than 16 per second, the brain blends them into continuous motion. Films at 24 fps and TV at 30 fps both exploit this.
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