Feynman Diagrams A Level Physics
They were developed by richard feynman to decribe the interactions in quantum electrodynamics qed.
Feynman diagrams a level physics. Feynman diagrams give a simple visualization of what would otherwise be an arcane and abstract formula. Feynman diagrams are graphical ways to represent exchange forces. Help with gcse physics aqa syllabus a as level and a2 level physics.
Physics revision site recommended to teachers as a resource by aqa ocr and edexcel examination boards also recommended by bbc bytesize winner of the iop web awards 2010 cyberphysics a physics revision aide for students at ks3 sats ks4 gcse and ks5 a and as level. So the best you re going to have to do is get a diagram. In theoretical physics a feynman diagram is a pictorial representation of the mathematical expressions describing the behavior and interaction of subatomic particles.
Richard feynman born in 1918 was an american theoretical physicist who played a major role in the field of quantum electrodynamics qed with a significant contribution. Each point at which the lines come together is called a vertex and at each vertex we must conserve charge baryon number and lepton number. One of the most commonly discussed and referenced diagrams is the feynman diagram found mostly in quantum particle physics.
The key points of a feynman diagram are the vertices representing those spacetime points at which in this example photons are created or absorbed. The interaction of subatomic particles can be complex and difficult to understand. The scheme is named after american physicist richard feynman who introduced the diagrams in 1948.
Usually feynman diagrams are read from left to right so here we can see a neutron decaying into a proton and a w exchange particle which subsequently. All processes involving photons and therefore all of the interactions associated with electromagnetism arise from elementary events of photon creation or photon annihilation. He made a great contribution in promoting particle physics as well using his other famous skill in addition to being a brilliant scientist ability to teach and share his knowledge in such a way that an audience could effortlessly understands it and enjoy it too in equal measure.
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