1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Electric Field In Medium Clarification

  1. Oct 13, 2012 #1
    So I just wanted to clarify:

    Because D = ε0E + P

    P being zero in vacuum
    and ∇D is constant regardless of medium

    if D was originally in a vacuum, the corresponding E would be greater than if it were in an insulating medium. So,

    E in vacuum > E in medium
  2. jcsd
  3. Oct 13, 2012 #2


    User Avatar
    2017 Award

    Staff: Mentor

    Not if you use materials where P is opposed to the direction of the electric field. That can happen in metamaterials for oscillating electromagnetic fields of specific frequencies.
  4. Oct 14, 2012 #3
    Thanks for clearing that up mfb.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook