8. What is the physical meaning of the time average Poynting Vector?
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What is the physical significance of the Poynting vector?
For the electromagnetic wave represented by Eqs. $( 32.19 )$ show that the Poynting vector (a) is in the same direction as the propagation of the wave and (b) has average magnitude given by Eqs. (32.29).
For the electromagnetic wave represented by Eq. $(32.19)$ show that the Poynting vector $(a)$ is in the same direction as the propagation of the wave and $(b)$ has average magnitude given by Eqs. $(32.29) .$
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