Why we see these frames (frames as in lines) moving vertically in pc monitors or tvs or other screens when they are recorded through a camera but not when see them with our eyes?
In: Physics
The screens are making us see moving images by blinking different still images really quickly, like a flip book. The camera records video by taking lots of still pictures, also very quickly. When the speed of one lines up incorrectly with the speed of the other, you see those frame lines. What you are seeing is the camera taking a picture of the exact instant the monitor is redrawing the next picture on the screen.
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