http://www.youtube.com/watch?v=IuyQSZX8HMI

sorry if you wise people have seen this but thought i would share, any ideas how this works?

its just sound which vibrates and creates a wave along the surface and therefore creating patterns?

i would think so at least
notice how the salt seems to be jumping/hopping around

That was amazing. So amazing, at first i thought it was fake. But I guess not. Thanks for posting that!!!

thats sorta neat...

I guess without the walls it wouldnt work. Maybe it has something to do with how the wave lengths bounce and when it has a serten frequency the waves will match each other making some parts of the table vibrate less and other more.

Just my guess on how it works.

Thats quite extraordinary.

xD Wonder how it works.

[quote name='f3liC' date='Apr 10 2007, 06:14 AM' post='1621620']
its just sound which vibrates and creates a wave along the surface and therefore creating patterns?


wow i couldn't figure that out but you came along and like a light, enlightened me

I would guess that the salt lines are the locations of what are known as standing waves, which as another poster already guessed fairly well, are formed under certain cirumstances when a wave and its reflection meet, causing a wave that appears to be static.