Ciro Santilli
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Coulomb's law | 🗖 nosplit | ↑ parent "Maxwell's equations" | 86

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Static case of Maxwell's law for electricity only.
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The "static" part is important: if this law were true for moving charges, we would be able to transmit information instantly at infinite distances. This is basically where the idea of field comes in.
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Video 43. Coulomb's Law experiment with torsion balance with a mirror on the balance to amplify rotations published by uclaphysics on Sep 30, 2010. Source.
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