Where in physics does randomness occur?

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SUMMARY

Randomness in physics is prominently observed in quantum mechanics, particularly with electrons, which exhibit unpredictable behavior. Additionally, radioactive decay serves as another example of true randomness, where a uranium nucleus can remain stable for extended periods before emitting an alpha particle without any discernible cause. This unpredictability highlights fundamental aspects of quantum theory and the nature of particles in the universe.

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Jarfi
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Electrons appear randomly in quantum physics, but are there any other places where particles behave randomly, is there any other true randomness in the universe, something we can not predict?
 
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How about radioactive decay? A uranium nucleus happily sits there for a billion years, then one day emits and alpha particle and decays. Why? There is no known reason.
 

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