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A video taken at 48 frames/sec or more would begin to show you the "truth". The faster the frame rate, the more true to life it would become. This is a perfect
by noonespecial 14y ago
A video taken at 48 frames/sec or more would begin to show you the "truth". The faster the frame rate, the more true to life it would become. This is a perfect example of a signal approaching the Nyquist frequency of the system sampling it.
- gus_massa 14y agoYes, but it's a little more complicated. With a camera of exactly 48fps and a wave of exactly 24hz you would see two intertwined jets. (It would be nice to see it. An easier implementation it is to use a 24fps camera and a 12hz wave.) With 48fps you can reconstruct any signal whose frequencies are less than 24hz (for example sin(2pit/23)+1/2 sin(2pit/17)). But the reconstruction algorithm must be implemented in a computer. The eye/brain simply "join" the nearest images of consecutive frames, so video with a 23hz signal sampled at 48fps would looks like two intertwined jets spinning slowly upwards. A computer algorithm (or a looot of hand calculations) can reconstruct the real only one jet falling down.
- mistercow 14y agoTo really get an idea of what it would look like in real life, you'd be best off with a slower shutter speed.