## Gauss’ Law, Part 1

In Derivation #3, the expression, $\frac{\partial \beta(t)}{\partial t}$, was written. This is an expression for a derivative of a function $\beta(t)$. Now that a derivative has been introduced, Maxwell’s equations can…

Here are a few notes about the symbol $\Delta$. This symbol appears frequently in physics. Let $\alpha$ be a real number. This statement is equivalent to $\alpha \in \mathbb{R}$. Then…