Feynman diagram

A Feynman diagram is a visual tool physicists use to represent interactions between particles, such as electrons and photons. It shows how particles exchange energy and forces, with lines representing particles moving through space and time, and vertices indicating interactions. These diagrams help scientists calculate probabilities of specific particle processes in quantum physics, making complex interactions more understandable and manageable. Essentially, a Feynman diagram is a shorthand map of how particles influence each other during fundamental interactions, simplifying the complex mathematics behind the behavior of matter at tiny scales.