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Maxwell's Equations

∇⋅E=ρε0,∇×E=−∂B∂t\nabla \cdot \mathbf{E} = \frac{\rho}{\varepsilon_0}, \quad \nabla \times \mathbf{E} = -\frac{\partial \mathbf{B}}{\partial t}

Four equations unifying electricity and magnetism—predicting electromagnetic waves and light.

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