There is a photograph of a computer screen shot by a camera set at an exposure time of 14s. During the exposure the curs

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answerhappygod
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There is a photograph of a computer screen shot by a camera set at an exposure time of 14s. During the exposure the curs

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There is a photograph of a computer screen shot by a camera setat an exposure time of 14s. During the exposure the cursor arrowwas moved around by the mouse, and we see it 15 times. What is therefresh rate of the screen?
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