Comments | filkertom: Your Morning Awesome

filkertom

Your Morning Awesome

Mar 15, 2013 07:38

Got any others that are cool like that? (Good starting point: go to the YouTube page for the vid and check out the column to the right.)

This entry was originally posted at http://filkertom.dreamwidth.org/1606228.html. You may comment there or here, although LJ tends to have a livelier conversation at this time.

awesome, oooh, science, music, video

Comments 6

shockwave77598 March 15 2013, 14:19:52 UTC

The "magic" trick is the choice of 24Hz. It's synced exactly with the sample rate of the camera, so you are snapping a snapshot 24 times a second and freezing the water in place. If you were standing there, you'd see nothing but a fan shaped splashing.

A similar trick was performed with strobe lights. Pulsing water jets would shoot a squirt at about 10hz while the strobes fired at 10.2hz. The result was a blob of water that moved very slowly through the air, seeming to defy gravity as it arced very slowly up and down into the pool again. When someone had a seizure because of the strobe, the pool got shut down. (Which is the only reason I don't have one for halloween.)

juglore March 15 2013, 15:03:51 UTC

Yeah I was going to say that the camera was a 24hz filter.

fractalwolf March 15 2013, 19:51:26 UTC

Neat! Thanks for explaining it :)

gardnerhill March 15 2013, 20:35:22 UTC

Sadly, as a Californian my first thought was "Please tell me they're catching that water and saving it for the garden or lawn!" Nope - straight into the drain, wasted, which put a literal damper on my enjoyment of science phenomena.

auronlu March 16 2013, 05:53:31 UTC

gardnerhill: there are many parts of the world which are not water-scarce where it really would be a waste to do that, just as it would be silly for us to put the Thanksgiving turkey and pumpkin pies out in the garage to save energy and fridge space, or keep a butter tub of kitty grit in the car for snow traction.

james_the_evil1 March 16 2013, 17:32:29 UTC

There was a post on "NASA Did That!" on Facebook yesterday that had something like this:
https://www.facebook.com/NasaDidThat/posts/159308164230114

If you're not a Facebook person the original article is here:
http://www.planetaryfolklore.com/2013/02/acoustic-levitation.html

It's illustrated with some really cool images & video, it's all about pharmaceutical manufacturers who deal with compounds that crystallize if they touch any surface using sound waves to suspend them in mid-air to form pills. Lemme see if one of the gifs will work here:

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