AQA A Level Physics復習筆記2.4.3 The Photoelectric Equation
The Photoelectric Equation Since energy is always conserved, the energy of an incident photon is equal to: The work function + the maximum kinetic energy of the photoelectron The energy with...
AQA A Level Physics復習筆記2.4.2 Threshold Frequency & Work Function
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...
AQA A Level Physics復習筆記2.3.5 Application of Conservation Laws
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 ...
AQA A Level Physics復習筆記2.3.4 Feynman Diagrams
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...
AQA A Level Physics復習筆記2.3.3 The Weak Interaction
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...
AQA A Level Physics復習筆記2.3.2 The Electromagnetic & Strong Force
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 ...
AQA A Level Physics復習筆記2.2.7 Collaborative Efforts in Particle Physics
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...
AQA A Level Physics復習筆記2.2.6 Strange Quarks
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...
AQA A Level Physics復習筆記2.2.5 Quarks & Antiquarks
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 ...
AQA A Level Physics復習筆記2.2.4 Leptons
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...
AQA A Level Physics復習筆記2.2.3 Mesons
Pions & The Strong Nuclear Force Pions Pions (π–mesons) can be positive (π+), negative (π–) or neutral (π0) The anti–particle of the positive pion is the negative pion (and vice versa) T...
AQA A Level Physics復習筆記2.2.2 Baryons
Baryon Number The baryon number,?B, is the number of baryons in an interaction B?depends on whether the particle is a baryon, anti-baryon or neither Baryons have a baryon number?B?= +1 Anti-...
