: Feynman diagrams :
Feynman diagrams are a wonderful visual expression of the mathematical expressions describing the behavior and interaction of subatomic particles.
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electron / positron annihilartion
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positron
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photon exchange
video credit : @domainofscienceHOW TO READ | How To Read Feynman Diagrams
DIAGRAMS & Quantum Electrodynamics QED | What Is Quantum Field Theory and Why Is It Incomplete? | Quanta Magazine
COMMON FEYNMAN DIAGRAMS |https://en.wikipedia.org/wiki/List_of_Feynman_diagrams