In a waveguide, always which condition holds good?(a) phase velocity = c(b) phase velocity greater than c(c) phase velocity lesser than c(d) group velocity = cI got this question during an internship interview.The query is from Properties of Waveguides in section Waveguides of Electromagnetic Theory

In a waveguide, always which condition holds good?(a) phase velocity =

1.	In a waveguide, always which condition holds good?(a) phase velocity = c(b) phase velocity greater than c(c) phase velocity lesser than c(d) group velocity = cI got this question during an internship interview.The query is from Properties of Waveguides in section Waveguides of Electromagnetic Theory
Answer» RIGHT answer is (b) phase VELOCITY greater than c To elaborate: In air medium, the phase velocity is assumed to be the SPEED of light. For WAVEGUIDES, the phase velocity is always greater than the speed of the light.

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