A law in Classical Electromagnetism and Newtonian Gravity.

Understanding Gauss's law

Classical Electromagnetism

Classical Electricity

Gauss's law for Electricity states that:

$$\nabla\cdot\vec E=\frac{q}{\epsilon_0}$$

Classical Magnetism

Gauss's law for Magnetism states that:

$$\nabla\cdot\vec B=0$$

Newtonian Gravity

Gauss's law for Gravity is simply Poisson's equation

$$\nabla\cdot\vec E=4\pi G\rho$$

Interesting Questions and Answers

A closed surface, no charge enclosed, yet flux not 0?

Does Coulomb's Law, with Gauss's Law, imply the existence of only three spatial dimensions?

Why are so many forces explainable using inverse squares when space is three dimensional?

Intuitive explanation of the inverse square power $\frac{1}{r^2}$ in Newton's law of gravity

Is Newton's universal gravitational constant the inverse of permittivity of mass in vacuum?

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