21. The dispersion relation for these waves is: 22. Their dispersion relation reads, for waves on the interface between two fluids of infinite depth: 23. In order to obtain the dispersion relation it is possible to proceed in two different ways. 24. The dispersion relation for extraordinary waves is 25. The group velocity therefore depends upon the dispersion relation connecting ? and " k ". 26. Each of these components travels with its own phase velocity, in accordance with the dispersion relation . 27. The underlying reason for the difference in dispersion relation is that ferromagnets violate time-reversal symmetry. 28. The parameter describes the frequency dependence of the sound velocity of the membrane ( dispersion relation ). 29. The frequency ? as a function of "'k "'is the dispersion relation . 30. The polarization dependent phase shift is also the reason why TE and TM guided modes have different dispersion relations .
