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Is plasma less dense than vacuum?

  1. Sep 29, 2009 #1
    Water and glass are considered denser than vacuum for their dielectric coefficient is greater than the dielectric constant of vacuum. The plasma's dielectric constant is
    [tex]\epsilon[/tex]0(1-([tex]\omega[/tex]p/[tex]\omega[/tex])2)
    Does this mean that plasma can be considered less dense than vacuum?...

    thanks in advance.
     
  2. jcsd
  3. Sep 29, 2009 #2
    imho density is associated with mass per unit volume, so...by definition nothing can be less dense then vacuum. Maybe I'm not understanding what you mean...
     
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