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How can we tell that elementary particles are elementary?

How can we tell that elementary particles are elementary? How do we know there aren’t micro-quarks inside every quark? Even nano-quarks in those?
Cameron Jones from Glasgow (Age: 5-14)


One Response

  1. We can’t be 100% certain that there aren’t smaller particles that make up quarks, that’s the fascinating thing about physics. Physics is at it’s simplist a collection of theories that explain why things in the world around us happen the way they do. Providing that adequate experiments have been done to demonstrate that the theory is valid then it is generally accepted until somebody can perform an experiment that proves that the theory is incorrect. At the moment the fact that quarks exist explains the things we understand about atomic particles, as we learn knew things about the way particles behave then quantum theory may need to be revised to explain why these things happen.

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