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Dec 23, 2018 at 8:40 vote accept N.G.Tyson
Dec 23, 2018 at 6:42 answer added InertialObserver timeline score: 4
Dec 23, 2018 at 6:40 comment added The Photon Because $\nabla\cdot{\bf E}=\rho/\epsilon$.
Dec 23, 2018 at 6:34 history asked N.G.Tyson CC BY-SA 4.0