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Topic: Water standing still
Message: Posted by: jay leslie (Mar 13, 2013 12:06PM)
A video camera, recording at the same speed as the soundwave, to make the water look like it's not moving BUT

How the sound makes the water stair-step is a mystery

http://games.yahoo.com/blogs/plugged-in/gravity-defying-video-illusion-goes-flow-183609014.html
Message: Posted by: BigWheel (Mar 13, 2013 01:03PM)
I suspect the effect is not as amazing without the 24 frames per second camera shots. This is a similar principal to what Edgerton did with the strobe light

http://en.wikipedia.org/wiki/Harold_Eugene_Edgerton

and

http://www.youtube.com/watch?v=OtxlQTmx1LE
Message: Posted by: WilburrUK (Mar 14, 2013 06:33PM)
[quote]
On 2013-03-13 13:06, jay leslie wrote:
A video camera, recording at the same speed as the soundwave, to make the water look like it's not moving BUT

How the sound makes the water stair-step is a mystery

http://games.yahoo.com/blogs/plugged-in/gravity-defying-video-illusion-goes-flow-183609014.html
[/quote]

Does look impressive. But I don't think the water is "stair-stepping", it's more that it's a helix being viewed in 2 dimensions so it looks a bit like it takes sharp bends.

This is clearer in the 23 and 25 hz versions
Message: Posted by: InstantMagicBen (Aug 4, 2013 09:43AM)
This is something I want to try! really interesting and impressive, and a great science lesson for the kids!
Message: Posted by: Simon Layland (Aug 7, 2015 09:33AM)
I can do this in yellow
Message: Posted by: VMids (Nov 18, 2015 08:11AM)
Wow!