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Acoustic levitation

submitted by eric3579

1 decade 2 years 2 months 1 week ago

Scientists at Argonne National Laboratory have discovered a way to use sound waves to levitate individual droplets of solutions containing different pharmaceuticals. While the connection between levitation and drug development may not be immediately apparent, a special relationship emerges at the molecular level.

Read more: http://www.anl.gov/articles/no-magic-show-real-world-levitation-inspire-better-pharmaceuticals

6 Comments

First thought "I wonder what it'd feel like to stick my hand in that"

jokingly says...

Fucking Magnets... How do they work?

I have a paper on something like this. *promote

Promoting this video back to the front page; last published Thursday, September 13th, 2012 6:39am PDT - promote requested by MycroftHomlz.

Witchcraft!

Basic points paraphrased from the article:

There are two speakers facing each other which are both producing the same tone. They are adjusted so that the waves interfere perfectly with each other, creating what's called a "standing wave". At the places where both waves have zero volume, called "nodes", the pressure coming up from the one wave and pressure coming down from the other is exactly equal, and they are strong enough to counteract gravity, so very light things can be suspended in mid air.

In this video, the guy adjusts the wave-o-metre thingie up and down, and it moves the nodes up and down, and the droplets move up and down as well.

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