Dolphin ring bubbles are also cool and involve vortices.<p><a href="http://www.youtube.com/watch?v=wuVgXJ55G6Y" rel="nofollow">http://www.youtube.com/watch?v=wuVgXJ55G6Y</a>
I didn't quite get why a vortex isn't a wave...<p>She said something about how a wave is a transfer of energy but not matter, but this seems incomplete. Obviously matter is transferring while the wave is passing.<p>I guess the technical difference that a wave will mostly return to its original state after one wavelength? But, doesn't the vortex mostly return to its original state after one rotation? Otherwise the food coloring would disperse a lot faster.<p>Hoping there's an easy explanation.
Super cool! Didn't realize that underwater vortices could have shapes other than the familiar 'tornado'. And apparently 'physicsing' is a new verb!
This is an awesome video. Can't stand the editing style though, with several audio tracks cut together to continually disrupt the listener's brain. Kinda like 'quick takes' of audio. It's seemingly become popular on youtube -- the worst offenders are the Green brothers -- oh, I see this <i>was</i> edited by them. Egad.<p>It's still a great video.
Looking at this demo makes me wonder if we could compare it to a black hole. Specifically that the vortexes are connected, that it creates a shadow (there is no light in a black hole), and is a black hole pushing light out or away (in another dimension or?)
Mods, please change link to<p><a href="https://www.youtube.com/watch?v=pnbJEg9r1o8" rel="nofollow">https://www.youtube.com/watch?v=pnbJEg9r1o8</a><p>This "sun-gazing" site looks like the worst sort of zero-value content aggregator.