Multiple choice

Persistence of vision is the principle behind

  1. camera

  2. cinema

  3. spectroscope

  4. periscope
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Persistence of vision refers to the phenomenon where the human eye retains an image for about 1/16th of a second after it disappears. Cinema exploits this by showing sequential frames at 24 frames per second, creating the illusion of continuous motion.

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