AudioFred Messages: 377 Registered: May 2009 Location: Houston
Illuminati (1st Degree)
It's a great example of time lapse photography. The camera takes the same number of images per second as the frequency that's modulating the water column, so when the pictures are shown as a video, the column appears to be a sine wave. If you were watching it in real time you would not see it this way at all.