I How elementary particles form matter

LeInvertedPenguine
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Hello,

So i wonder how elementary particles which are said to have no physical extension on a larger scale are able to form what is known to us as matter? Aka stuff with an observable physical extension.
 
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That elementary particles are point-like does not mean that they cannot interact at a distance. What stops you from smashing your hand through the table is really electromagnetic interactions between the molecules in the table and the molecules in your hand. Just as it is electromagnetic interactions that keep the molecules together. Most of what you experience in everyday life that is not due to gravity is due to electromagnetic interactions.
 
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The nucleus and electrons in atoms are not touching - they are about an Angstrom apart.
 
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LeInvertedPenguine said:
Hello,

So i wonder how elementary particles which are said to have no physical extension on a larger scale are able to form what is known to us as matter? Aka stuff with an observable physical extension.
To add to what others have already said, 99%+ of what you think of as matter with "observable physical extension." in 3D is actually totally empty space.
 
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Ok, thanks everyone! Your answers helped me understand how i went about it wrong :)
 
I read Hanbury Brown and Twiss's experiment is using one beam but split into two to test their correlation. It said the traditional correlation test were using two beams........ This confused me, sorry. All the correlation tests I learnt such as Stern-Gerlash are using one beam? (Sorry if I am wrong) I was also told traditional interferometers are concerning about amplitude but Hanbury Brown and Twiss were concerning about intensity? Isn't the square of amplitude is the intensity? Please...
I am not sure if this belongs in the biology section, but it appears more of a quantum physics question. Mike Wiest, Associate Professor of Neuroscience at Wellesley College in the US. In 2024 he published the results of an experiment on anaesthesia which purported to point to a role of quantum processes in consciousness; here is a popular exposition: https://neurosciencenews.com/quantum-process-consciousness-27624/ As my expertise in neuroscience doesn't reach up to an ant's ear...
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
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