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IEVref:705-02-21ID:
Language:enStatus: Standard
Term: group velocity (vector)
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Definition: the velocity vector, at a point in a propagation medium, of a signal which may be ideally represented by two superimposed sinusoidal waves of equal amplitude and slightly different frequencies approaching a common frequency limit

NOTE – In the most general case, the magnitude of the group velocity vector equals the derivative of the frequency with respect to the reciprocal of the wavelength, and the components of the group velocity along the coordinate axes equal the partial derivatives of the angular frequency with respect to the components of the real part K MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meWabaGacmGadiWaaiWabaabaiaafaaakeaadaWhcaqaaiqadUeagaqbaaGaay51Gaaaaa@3C1D@ of the wave vector K _ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meWabaGacmGadiWaaiWabaabaiaafaaake aadaWhcaqaamaamaaabaGaam4saaaaaiaawEniaaaa@3C23@ .


Publication date:1995-09
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