The dispersion equation of a waveguide, which relates the wa

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The dispersion equation of a waveguide, which relates the wavenumber k to the frequency ω, is . where the speed of light c = 3 × 10⁸ m/s, and ω_o is a constant. If the group velocity is 2 × 10⁸ m/s, then the phase velocity is

[GATE EC 2019]

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