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Energy possessed by Electric Field

  1. Sep 18, 2011 #1
    Consider a parallel plate capacitor.
    It is said that electromagnetic waves store electrical energy.
    Since electromagnetic waves don't require a medium to propogate, we can say that electrical energy can be stored in a space where there are no medium particles (say vaccuum).
    Where exactly is electrical energy stored? It is not so intuitive.
     
  2. jcsd
  3. Sep 19, 2011 #2
    in the field itself.

    in fact the energy is proportional to the square of the field.
     
  4. Sep 19, 2011 #3
    You can think of it in various ways, but you did work to separate the charges and build up the field between the plates, so I think of that energy being stored in the separated charges, i.e. potential energy.
     
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