Threshold Frequency The photoelectric effect is the phenomena in which electrons are emitted from the surface of a metal upon the absorption of electromagnetic radiation Electrons removed fr...
Application of Conservation Laws All particle interactions must obey a set of conservation laws. These are conservation of: Charge, Q Baryon number, B Lepton Number, L Strangeness, S Energy ...
Feynman Diagrams Feynman diagrams are a clear way of representing particle interactions in terms of their incoming and outgoing particles and exchange particles Although there are many varia...
The Weak Interaction The weak interaction is responsible for the radioactive decay of atoms The exchange particle that carries this force is the W–, W+ or Z0 boson The type of exchange parti...
The Electromagnetic Force The electromagnetic force is only between charged particles The exchange particle that carries this force is the virtual photon, γ Properties of the photon are: It ...
Collaborative Efforts in Particle Physics The field of particle physics is constantly changing and as time goes on, our knowledge and understanding of the nature of particles changes too Par...
Strange Particles Strange particles are particles that include a strange or anti-strange quark An example of these are kaons Strange particles always: Are produced through the strong interac...
Properties of Quarks & Antiquarks Quarks The three most common flavours of quarks are: up, down and strange The majority of hadrons are made up of different combinations of these quarks ...
Leptons & Antileptons Leptons are a group of fundamental (elementary) particles This means they are not made up of any other particles (no quarks) Leptons interact with other part...
