Answers are grounded in this paper and cite their sources.
Relationship between group and phase velocities of electromagnetic waves in a drifting uniaxial plasma is discussed. When determining whether propagation between two points is possible, the allowed direction of the group velocity vector and not that of the phase velocity vector is important.
No takes yet. Share an insight, caveat, or question.
Nagendra Singh (1972) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: