So I'm doing a electromagnetics course and we've been given equations for electric flux and electric flux density but I can't seem to find any sort of intuitive explanation for these.
In my lecture notes, the electric flux density is introduced first as vector D and given the formula:
Vector D = epsilon*Vector E
The electric flux is defined as:
From my understanding from high school, the electric flux is the number of electric field lines passing through an area(perpendicular.)
I'm just really confused as to what is what in sort of a realistic viewpoint.