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Electromagnetic wave propagation

  1. Jul 26, 2007 #1
    Please consider a plane wave that propagates through a dielectric with friendly properties (isotropic, non-conducting...) with speed c/n. What would happen if we remove the dielectric and the wave continues to propagate in empty space?
     
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  3. Jul 27, 2007 #2

    Meir Achuz

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    Then speed = c.
     
  4. Jul 27, 2007 #3
    e.m wave

    Thanks. It is c but what happens from an enegetic point of view?
     
  5. Jul 27, 2007 #4

    Meir Achuz

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    If the end of the dielectric is a flat face, use of the Fresnel relations show that energ is conserved. Some of the original energy continues, and some is reflected.
     
  6. Jul 28, 2007 #5
    Interesting. Note that the frequency of the light does not change in the medium, only the wavelength. So, with E=hf....
     
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