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EM wave polarized in the time direction?

  1. Jan 3, 2010 #1
    Is it possible to polarize an EM wave in the time direction as you would in any of the spatial dimentions?
  2. jcsd
  3. Jan 3, 2010 #2


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    Time is not a vector quantity nor does it have degrees of freedom in its direction of progression.
  4. Jan 3, 2010 #3
    Actually photons can be polarised in all 4 directions but the longitudinal and time-like polarisations only exist as virtual particles.
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