Q4
The dispersion relation for a, low density plasma is ω2 = ω02 + c2 k2, where ω0 is the plasma frequency and c is the speed of light in free space. The relationship between the group velocity (vg) and phase velocity (vp) is
A.
vp = vg
B.
vp =
C.
vp vg = c2
AnswerD.
vg =
Answer: Option C
Solution
Answer: Option C
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