Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Criteria for propagation of EM wave

  1. Sep 13, 2008 #1
    1. The problem statement, all variables and given/known data
    When an EM wave propagates, the E and M field at a point are perpendicular. If E and M at a point are NOT perpendicular to each other, can it be that an EM wave is passing through that point?

    2. Relevant equations

    3. The attempt at a solution
    Consider a linearly polarized light travelling. If I create a constant electric field(by using a device, for example a "saturated" capacitor), the light won't vanish as the energy won't be conserved.
    So an EM wave MAY be propagating. I don't know if this is correct.
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted