The Photoelectric Effect– work function, threshold frequency, electron, Plank constant, photoelectron, photon
Collisions of Electrons with Atoms – the electron volt, ionisation, excitation, energy levels
Energy Levels and Photon Emission– line spectra, transitions, emission spectra, absorption spectra, energy levels, photons
Wave-particle Duality – diffraction, photoelectric effect, wave, particle, De Broglie wavelength, momentum
