If we take the usual tact of describing the full response of any loss-free
material (including perfect vacuum) to an externally impressed electric
field to be "composed" of three parts which are most commonly represented by
the vectors E, D, & P, then I am so old fashioned that I (and any student I
have had) will always call these three vectors:
1) E-field ..... Electric Field
2) D-field ..... Displacement Field
3) P-field ..... Polarization Field
I don't do this just because it was the first set of names I was taught for
these three distinctly separate and recognizable contributions to the full
electric response of any material (including "God's Vacuum"***). Rather, I
use these names because they seem uniquely descriptive of the "contribution"
that each field makes to the total response of any loss-free material to an
external electric field.
It may be a simple minded approach which requires the assumption of
linearity and it may ignore all higher order effects but us simple minded
people have to start somewhere on a path to understanding.
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"Don't write merely to be understood. Write so that you cannot possibly be
misunderstood." Robert Louis Stevenson