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Chapter 10
To flnd the relation between kx;ky;kz and the angular frequency! of the mode, we insert this trial solution into the three-dimensional wave equation @2A @x2 + @2A @y2 + @2A @z2 = 1 c2 @2A @t2: (10.3) The time dependence of the wave is also sinusoidal, A = A0 sin!t and so we can flnd the dispersion relation for the waves, that is, the relation ...
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