Chladni Plates

While on the topic of oscillations and cool wave behavior, check out the following vid of a Chladni Plate in action. Think you can come up with the wave function that describes this bad boy?

To make this, all you need is a somewhat think metal plate, some sand or salt (really any finely grained material will work) and finally a violin thingy (the tool you use to set the violin strings into oscillation)

The sand basically falls into the contours as the metal plate is deformed from the oscillations.

Coupled Oscillators and Pendulums

So guys, this video was shown to me during one of my labs. I found it uber cool! Watch the entire video it really makes you think about what exactly is happening here...