Properties of waves
Andrew Norton uses a ripple tank to demonstrate some basic features of waves.
Oscillation and wave speed
Andrew Norton demonstrates the effects of changing the driving frequency of the oscillator that's creating the wave.
Apertures and diffraction
Andrew Norton shows what happens when waves pass through apertures of different sizes.
Diffraction of light
Andrew Norton uses lasers to show what happens when light passes through a small aperture.
Passing light through multiple apertures
Andrew Norton shows how diffraction gratings produce characteristic sets of light spots.