Link to our latest notes and resources: https://drive.google.com/drive/u/2/folders/15FnZdp3NJ15WmXnkrSWgi5ltd5rUI9Bg 22 Quantum physics 22.1 Energy and momentum of a photon Candidates should be able to: 1 understand that electromagnetic radiation has a particulate nature 2 understand that a photon is a quantum of electromagnetic energy 3 recall and use E = hf 4 use the electronvolt (eV) as a unit of energy 5 understand that a photon has momentum and that the momentum is given by p = E / c 22.2 Photoelectric effect Candidates should be able to: 1 understand that photoelectrons may be emitted from a metal surface when it is illuminated by electromagnetic radiation 2 understand and use the terms threshold frequency and threshold wavelength 3 explain photoelectric emission in terms of photon energy and work function energy 4 recall and use hf = Φ + 2 1mvmax 2 5 explain why the maximum kinetic energy of photoelectrons is independent of intensity, whereas the photoelectric current is pro

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