this post was submitted on 05 Nov 2023
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Guess what electromagnetism turned out to be
They're different things. The OP means electromagnetism, Coulomb's law has nothing to do with quantum mechanics, it's classical physics.
Okay but tell me, what theory superceded electromagnetism?
Sure, EM is still useful, I use it in my work, but in the end, it all boils down to QM.
Quantum mechanics didn't supersede electromagnetism. Again, they're different things. Electromagnetism is a fundamental interaction. Whereas quantum mechanics describes the mechanics of quantum particles. Whether those particles are affected by electromagnetic forces or not. It's a description of how they behave at quantum scales.
Coulomb's law has nothing to do with quantum mechanics, it's a description of how macroscopic charged particles interact. What the OP should have said to be correct is:
I don't know where he got quantum mechanics from.