EM wave polarized in the time direction?

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cuallito
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Is it possible to polarize an EM wave in the time direction as you would in any of the spatial dimentions?
 

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cuallito said:
Is it possible to polarize an EM wave in the time direction as you would in any of the spatial dimentions?

Time is not a vector quantity nor does it have degrees of freedom in its direction of progression.
 
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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