Let there Be Light

ג וַיֹּאמֶר אֱלֹהִים, יְהִי אוֹר; וַיְהִי-אוֹר.

[3. And God said: ‘Let there be light.’ And there was light.]

– God, Genesis 1.

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\nabla \cdot \mathbf{E} = \frac {\rho} {\varepsilon_0}

\nabla \cdot \mathbf{B} = 0

\nabla \times \mathbf{E} = -\frac{\partial \mathbf{B}} {\partial t}

\nabla \times \mathbf{B} = \mu_0\mathbf{J} + \mu_0 \varepsilon_0 \frac{\partial \mathbf{E}} {\partial t}\

– James Clerk Maxwell (1865), ‘A Dynamical Theory of the Electromagnetic Field’, Philosophical Transactions of the Royal Society of London, 155, p. 459-512.