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For plane wave propagating in free space or two conductor transmission line, what must be the relationship between the phase velocity vp , the group velocity vg and speed of light c? | |
A. | vp > c > vg [Wrong Answer] |
B. | vp < c < vg [Wrong Answer] |
C. | vp = c = vg [Correct Answer] |
D. | vp < vg < c [Wrong Answer] |