Thanks Tim!
So D is the field imposed on the dielectric by the free charges in, say, the capacitor; P is the field created by the polarization surface charges; and E is the resulting net field in the dielectric.
Since P is defined as going from negative to positive, the net field is E = D...
Hi!
I can't wrap my head around the formula \textbf{D} = \epsilon \textbf{E} + \textbf{P}.
The electric field, \textbf{E}, goes through the dielectric. It polarizes the atoms/molecules, which creates a field going the opposite way, which cancels out at least part of \textbf{E} (right?)...