Next: Cutoff and Resonance
Up: Waves in Cold Plasmas
Previous: ColdPlasma Dispersion Relation
A pure righthanded circularly polarized wave propagating along the
axis takes the form
In terms of complex amplitudes, this becomes

(506) 
Similarly, a lefthanded circularly polarized wave is characterized by

(507) 
The polarization of the transverse electric field is obtained from the
middle line of Eq. (490):

(508) 
For the case of parallel propagation, with , the above formula
yields
. Similarly, for the case of parallel propagation,
with , we obtain
. Thus, it is clear that
the roots and in Eqs. (499)(501) correspond to
right and lefthanded circularly polarized waves, respectively.
Next: Cutoff and Resonance
Up: Waves in Cold Plasmas
Previous: ColdPlasma Dispersion Relation
Richard Fitzpatrick
20110331