The direction of the Poynting vector represen | vedclass

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(C) The Poynting vector $\vec{S}$ is defined as the cross product of the electric field $\vec{E}$ and the magnetic field $\vec{B}$ divided by the perm

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The direction of propagation of $EM$ wave

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(C) The Poynting vector $\vec{S}$ is defined as the cross product of the electric field $\vec{E}$ and the magnetic field $\vec{B}$ divided by the permeability of free space $\mu_0$: $\vec{S} = \frac{\vec{E} 	imes \vec{B}}{\mu_0}$ The direction of the Poynting vector $\vec{S}$ represents the direction of energy flow,which is the same as the direction of propagation of the $EM$ wave. Therefore,the correct option is $C$.

The direction of the Poynting vector represents:

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