Question: Assuming negligible damping (j = 0), calculate the group velocity (vg = dw/dk) of the waves described by Eqs. 9.166 and 9.169. Show that vg

Assuming negligible damping (γj = 0), calculate the group velocity (vg = dw/dk) of the waves described by Eqs. 9.166 and 9.169. Show that vg < c, even when v > c.

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