Physics
Doppler Effect
Move a sound source and an observer, change the speed of sound and the wind, and watch the observed frequency shift — all the way to a supersonic Mach cone.
Simulations
Free, interactive simulations you can run in your browser. Filter by subject or level to find the right one for your class.
PhysicsEngineering
Wave Propagation Through Materials
Send a sound or electromagnetic wave into a slab of water, glass, concrete, metal or lead and see how much is reflected, absorbed and transmitted.
PhysicsChemistry
3D Brillouin Zone & Bragg Diffraction
Build reciprocal lattices, explore 3D Brillouin zones and simulate X-ray diffraction with Bragg’s law, structure factors, band structures and peak fitting.