Velocity factor

（重定向自Velocity of Propagation）

The velocity factor (VF), also called wave propagation speed or velocity of propagation (VoP or $v_\mathrm{P}$ ), of a transmission medium is the ratio of the speed at which a wavefront (of an acoustic signal, for example, or an electromagnetic signal, a radio signal, a light pulse in a fibre channel or a change of the electrical voltage on a copper wire) passes through the medium, to the speed of light in a vacuum. For optical signals, the velocity factor is the reciprocal of the refractive index.

单词	Velocity of Propagation
释义	Velocity of Propagation 英语百科 Velocity factor （重定向自Velocity of Propagation） The velocity factor (VF), also called wave propagation speed or velocity of propagation (VoP or $v_\mathrm{P}$ ), of a transmission medium is the ratio of the speed at which a wavefront (of an acoustic signal, for example, or an electromagnetic signal, a radio signal, a light pulse in a fibre channel or a change of the electrical voltage on a copper wire) passes through the medium, to the speed of light in a vacuum. For optical signals, the velocity factor is the reciprocal of the refractive index.
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