Things that simulate things
:)
A simulation of the electric field with charged surfaces that you can draw.
Explaining how magnetism is a product of the electric force and relativity.
Comparing a realistic pendulum to the small angle approximation.
Visualization of a longitudinal wave with thousands of particles.
A simulation of waves on wiggling springs.
Visualizes the doppler effect with a draggable sound source.
Visualizes interference from two point sources.
Visualizing what goes on in a thin film, and how it makes such pretty colours.
A simulation of an N-slit interference pattern using phasors.
A full simulation of light as a wave in various scenes.