Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.2.1.3 · Particles and radiation · Particles
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3.2.1.3 Particles, antiparticles and photons
| Content | Opportunities for skills development |
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For every type of particle, there is a corresponding antiparticle. Comparison of particle and antiparticle masses, charge and rest energy in MeV. Students should know that the positron, antiproton, antineutron and antineutrino are the antiparticles of the electron, proton, neutron and neutrino respectively. Photon model of electromagnetic radiation, the Planck constant. |
Knowledge of annihilation and pair production and the energies involved.
The use of is not required in calculations.
AT i Detection of gamma radiation. MS 1.1, 2.2 Students could determine the frequency and wavelength of the two gamma photons produced when a ‘slow’ electron and a ‘slow' positron annihilate each other. The PET scanner could be used as an application of annihilation. |