em energy flow

Question

Rate of electromagnetic energy flow per unit area given by:

RankGuru · Accepted Answer

The **Poynting Vector** ($\vec{S}$) represents the directional energy flux (power per unit area) of an EM wave.
$\vec{S} = \frac{1}{\mu_0} (\vec{E} 	imes \vec{B})$
- The cross product direction indicates the direction of wave propagation.
- The magnitude $|S|$ gives the intensity of the wave in Watts per square meter ($W/m^2$).

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em energy flow

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