For plane wave propagating in free space or two conductor transmission – McqOptions

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1.	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
B.	vp < c < vg
C.	vp = c = vg
D.	vp < vg < c
Answer» D. vp < vg < c

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