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A plane EM wave is travelling in an unbound loss less dielectric having μy = 1 and εy = 4, the time average Poynting vector of the wave is 5 W/m3 . The phase velocity vp (assuming velocity of light as 3 x 108 m/sec) is

Options
  • A. 1.5 x 108 m/sec
  • B. 3 x 108 m/sec
  • C. 2.5 x 108 m/sec
  • D. 0.5 x 108 m/sec
  • Correct Answer: Option A

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