Feynman diagram Article

Feynman diagram summary

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Below is the article summary. For the full article, see Feynman diagram.

Feynman diagram, Graphical method of representing the interactions of elementary particles. It was invented by Richard P. Feynman, who introduced the diagrams as an aid to calculating the processes that occur between electrons and photons. A Feynman diagram consists of two axes, one representing space, the other representing time. Electrons are represented as straight lines, while photons are shown as wavy lines. The interaction between particles appears as a junction of three lines, or a vertex. Feynman diagrams are now used to show all types of particle interactions.