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The product of the phase and the group velocities is given by the

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in Electromagnetic Theory by (188k points)
The product of the phase and the group velocities is given by the

(a) Speed of light

(b) Speed of light/2

(c) 2 x Speed of light

(d) (speed of light)/4

The question was posed to me during an internship interview.

Query is from Phase and Group Velocity in portion Waveguides of Electromagnetic Theory

1 Answer

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Best answer
Correct choice is (d) (speed of light)/4

Best explanation: The product of the phase and the group velocities is given by the square of the speed of the light. Thus Vp x Vg = c^2 is the relation.

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