A quote from the Wikipedia page for Permittivity:
More electric flux exists in a medium with a low permittivity (per unit charge) because of polarization effects.
This makes sense to me.
My understanding is that, exposed to an electric field, atoms will develop correspondingly aligned induced dipoles. The effects of all of these dipoles, except the ones at the very edges of the medium, will cancel each other out (being adjacent in the medium to the opposite pole of the next atom). The uncancelled layer of positive charge at one end and negative at the other result in an electric field within the medium that opposes the surrounding electric field. $D$ denotes electric flux, which takes into account all charges and resulting fields involved, not just the original, which is denoted $E$.
Wouldn't $D = \epsilon E$ mean that the greater the permittivity (the greater the opposing electric field due to polarization in the medium), the greater the electric flux? What happened to the electric flux being diminished with greater opposing field?
(I've been seeing 'electric flux', 'electric flux density', 'electric displacement field' and '$D$' used interchangeably. Are my definitions wrong, perhaps, and I'm trying to merge two different concepts?) <- It seems that this was the case. New question: What exactly is the displacement field ($D$), and what does it represents physically?