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This video is adapted from: https://www.youtube.com/@BasylDoesPhysics
■■ appreciate the particulate nature of electromagnetic radiation
■■ interpret the photoelectric eff ect in terms of photons
■■ describe electron diff raction and the evidence it provides for the wave nature of matter
■■ explain line spectra in terms of discrete electron energy levels in atoms
■■ use simple band theory to explain the different electrical conductivities of metals, insulators and semiconductors