Algodoo

Drag middle circle for 3D ripple effect, drag outside circle or rotate/release 1 of the middle circles to create the 3D ARCH.
*Note: the sound wave test utilizing the use of the arrow keys is no longer available. sorry.*

((The NEW feature is made specifically for physics majors and it is the reason the scene is titled the way it is. Maybe some of you have heard or seen the concept of the Bell Wave Machine. If you want to see what i am talking about, enter the link at the end of the descripton. In phun it is hard to make 3D objects so it is really hard to show waves. However, when you start it up, pay attention to the overlapping dark bars on the bottom of the device, grab the middle circle and quickly drag to the left and right, then release and move your cursor off the device. If done right, you will see a dark wave moving down one side and a light wave moving down the other. These are `free end reflections`. if you were to fixate the outer circle, it would become a `fixed end reflection` and the waves would reverse. When the pulse gets back to the center, there is a whiplash effect which is a great demonstration of the transfer of energy.))

Comment and let me know if this is close to the real thing, however, i have a fantastic 3D representation of the Bell Wave machine in production that will not use the circles and use the actual metal rods.

http://www.physics.ucla.edu/demoweb/demomanual/harmonic_motion_and_waves/waves/bell_wave_machine.html

(roll over the image at the bottom of the webpage to see how it works)