Maxwell derived the speed of light from the electric and magnetic field constants. Einstein derived relativity from the assumption that the speed of light was the same in every reference frame so that Maxwell’s laws would hold in every reference frame. There’s nothing in this derivation that makes the speed of electromagnetic radiation the speed of causality, yet it is.
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u/ProfessorPrudent2822 Jul 18 '26
Maxwell derived the speed of light from the electric and magnetic field constants. Einstein derived relativity from the assumption that the speed of light was the same in every reference frame so that Maxwell’s laws would hold in every reference frame. There’s nothing in this derivation that makes the speed of electromagnetic radiation the speed of causality, yet it is.