diff --git a/education/physics/PHYS2220/Gauss's Law.md b/education/physics/PHYS2220/Gauss's Law.md
index 017d8e5..e82f550 100644
--- a/education/physics/PHYS2220/Gauss's Law.md	
+++ b/education/physics/PHYS2220/Gauss's Law.md	
@@ -1,2 +1,9 @@
 # Flux
-Flux refers to a flow of matter or energy. Examples include water through a pipe, blood through veins, or air over an airplane's wing.
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+Flux refers to a flow of matter or energy. Examples include water through a pipe, blood through veins, or air over an airplane's wing.
+
+While there's nothing directly *flowing* in an electric field, the term flux is used to describe the total strength of a field.
+
+In the simplest case with a uniform field of magnitude $E$ perpendicular to an area $A$, the flux is described as follows:
+$$ \Phi = EA$$
+- $E$ refers to the amplitude
+- $A$ refers to the area
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