Longitudinal and transverse waves, and the wave equation.
Snell’s law, critical angle and optical fibres.
Evidence that light is a transverse wave.
Construct converging and diverging lens ray diagrams
Calculate distance from an echo delay
Path difference, coherence and Young’s double slit.
Nodes, antinodes and harmonics.
Photons, work function and stopping potential.
De Broglie wavelength and electron diffraction.
Measure sound wavelength with two oscilloscope channels
Explain diffraction using secondary wavelets
Work through each topic to complete the section.