# Tag Info

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

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

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?