Here is the first offshoot program from my wave on a string lab. This one is designed to look at superposition of waves. Students will have control over the frequency, amplitude and # of waves for two waves (one approaching from the right and one from the left). Students can observe the pattern changes that occur as these two waves interact.
There is an auto slo-motion feature that you can activate that will slow the progress of the waves when they first start to overlap and then return to normal speed when the waves are no longer interacting.
There is a ghosting feature that can be activated so that students can see what the two waves would have looked like had they not interfered.
Students can invert one or both waves.
Students can change the waves from sine curves to square waves to triangle waves.
Once students pause the action they can slowly step the action forward and backwards.http://www.tandftechnology.com/Physics/Programs/Labs/InterferingWaves/index.html