Edexcel A Level Physics:复习笔记8.11 The Standard Model
Baryons & Mesons All particles of matter are made up of either quarks and/or leptons The standard model of particle physics categorises quarks and leptons by charge and mass Quarks and leptons ...
Edexcel A Level Physics:复习笔记8.10 Relativistic Situations
Relativistic Situations Accelerated particles often reach speeds that are very close to the speed of light At such high velocities and energies, relativistic effects begin to become important These...
Edexcel A Level Physics:复习笔记8.9 Unit Conversions for Energy & Mass
Unit Conversions for Energy & Mass Units of Energy The electronvolt is a unit of energy It is equivalent to the amount of energy transferred to an electron accelerated across a potential differ...
Edexcel A Level Physics:复习笔记8.8 Annihilation of Matter & Antimatter
Annihilation of Matter & Antimatter Annihilation When a particle meets its antiparticle partner, the two will annihilate Annihilation is: When a particle meets its equivalent anti–particle they...
Edexcel A Level Physics:复习笔记8.7 High Energy Particle Collisions
High Energy Particle Collisions The Diameter of a Nucleon High energy electron beams can be used to analyse nucleons, e.g. Protons Neutrons When electrons are accelerated to very high energies, the...
Edexcel A Level Physics:复习笔记8.6 Interpreting Particle Tracks
Interpreting Particle Tracks Particle detectors that count particles, like Geiger-Muller tubes, are useful but they cannot distinguish different types of particle Modern detectors can show the path...
Edexcel A Level Physics:复习笔记8.5 Radius of a Charged Particle in a Magnetic Field
Radius of a Charged Particle in a Magnetic Field A charged particle in uniform magnetic field which is perpendicular to its direction of motion travels in a circular path This is because the magnet...
Edexcel A Level Physics:复习笔记8.4 Particle Accelerators & Detectors
Particle Accelerators & Detectors Linear Accelerators A linear accelerator (LINAC) is a type of particle accelerator that accelerates ions (charged particles) to very high speeds in straight li...
Edexcel A Level Physics:复习笔记8.3 Thermionic Emission
Thermionic Emission When metals are heated, the conduction electrons within them gain energy If these electrons gain sufficient energy, they are able to leave the surface of the metal This is known...
