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In free space, the ratio of frequency to the velocity of light gives the phase constant. State True/False.

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In free space, the ratio of frequency to the velocity of light gives the phase constant. State True/False.

(a) True

(b) False

The question was asked in an interview for job.

The question is from Plane Waves in Free Space topic in division EM Wave Propagation of Electromagnetic Theory

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Right choice is (a) True

The explanation: The phase constant is given by the ratio of the frequency in radian/sec to the velocity of the wave propagating. In free space, the velocity is considered to be the velocity of light. Thus the statement is true.

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