- https://www.cabrillo.edu/~jmccullough/Applets/Flash/Fluids,%20Oscillation...
- Interesting explanation of how Doppler effect happens using sinusoidal waves only.
- https://www.cabrillo.edu/~jmccullough/Applets/Flash/Fluids,%20Oscillation...
- Great sim showing how Doppler effect "squishes" waves and "stretches" the waves depending on movement of the source.
- https://www.lon-capa.org/~mmp/applist/doppler/d.htm
- Another sim showing what the Doppler effect looks like for squished and stretched waves depending on motion of source.
- https://galileoandeinstein.physics.virginia.edu/more_stuff/flashlets/dopp...
- Doppler applet. You have a microphone to place so you can hear the difference between the object moving towards and away.
- https://highered.mheducation.com/olcweb/cgi/pluginpop.cgi?it=swf::800::60...
- The graphics are cool. Has a planet and spaceship and you can control the path of both, where the planet emits light/sound waves. It shows a graph of the sinusoidal wave that changes depending on the relative motion of each.
- https://astro.unl.edu/classaction/animations/light/dopplershift.html
- Very simple graphics but you can click and drag observer and source. It also keeps a record of what's going on in the cartesian sinuisoidal graph.