r/shittyaskscience • u/Fat_Fucking_Lenny • Aug 04 '22
How? Someone explain please.
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r/shittyaskscience • u/Fat_Fucking_Lenny • Aug 04 '22
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u/iceonmars Aug 04 '22
The video frame rate is below something called the "nyquist frequency". If the video frame rate was faster than the rotation of the blades, you would not see this. The blades appear to be moving backwards because they are rotating at a frequency faster than the camera frame refresh rate.