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What is a Feynman diagram?
PhysicsQuantum mechanics
Quick Answer
A Feynman diagram is a visual tool used to calculate and picture particle interactions in quantum field theory. It shows how particles exchange force carriers.
The Full Story
Feynman diagrams were introduced by Richard Feynman in the 1940s as a way to simplify calculations in quantum electrodynamics. The lines and vertices in the diagram represent particles and their interactions, such as an electron emitting or absorbing a photon. These drawings are not literal pictures of what particles look like, but they make complex calculations manageable and intuitive. They are now used across particle physics to study the electromagnetic, weak, and strong forces.
Key Facts
1.Created in the 1940s
2.Used by Richard Feynman
3.Aid calculations in particle physics
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