Maxwell's Equations/Gauss's Law

Physical Law

 * $\nabla \cdot \mathbf E = \dfrac \rho {\varepsilon_0}$

where:
 * $\nabla \cdot \mathbf E$ denotes the divergence of the electric field $\mathbf E$
 * $\rho$ denotes electric charge density
 * $\varepsilon_0$ denotes the vacuum permittivity.

Also presented as
This equation can also be seen presented as:


 * $\nabla \cdot \mathbf D = \rho$

where $\mathbf D = \varepsilon_0 \mathbf E$ denotes the electric displacement field.