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| Q. |
Persistence of vision is the Principle behind: |
| A. | Binocular |
| B. | Cinema |
| C. | Periscope |
| D. | Camera |
| Answer» B. Cinema | |
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Explanation: Persistence of vision is the phenomenon of the eye by which an afterimage is thought to persist for approximately one twenty-fifth of a second on the retina. In the early days of cinema, it was scientifically determined that a frame rate of less than 16 frames per second (frame/s) caused the mind to see flashing images. |
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