Study constructive and destructive interference with this simulation. Interference Model: Ripple Tank investigates constructive and destructive interference between two point sources. The user can change the point source frequency, location and separation and phase difference between the point sources. The model also shows the difference in distance from the point sources to a movable observation point.

With this simulation, you can explore the interference pattern that results from the superposition of two sources of waves. The simulation models what happens with two speakers, emitting sound waves; with two oscillating bobbers in a water tank, producing water waves; or, with two light sources, so the interference is with two light waves.
In the simulation, red regions are areas where the net displacement is positive (such as when two peaks overlap) and blue regions are areas where the net displacement is negative (such as when two troughs overlap). In the black regions, the net displacement is zero, or close to zero.

Requirements:
* Java

The license of this software is Freeware, you can free download and free use this graphing software.