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24.4: Energy in Electromagnetic Waves
https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/24%3A_Electromagnetic_Waves/24.04%3A_Energy_in_Electromagnetic_Waves
The energy carried by any wave is proportional to its amplitude squared. For electromagnetic waves, this means intensity can be expressed as $I_{ave} = \frac{c \epsilon_{0} E_{0}^{2}}{2},$ where \(I...The energy carried by any wave is proportional to its amplitude squared. For electromagnetic waves, this means intensity can be expressed as $I_{ave} = \frac{c \epsilon_{0} E_{0}^{2}}{2},$ where $I_{ave}$ is the average intensity in $W/m^{2}$ , and $E_{0}$ is the maximum electric field strength of a continuous sinusoidal wave. This can also be expressed in terms of the maximum magnetic field strength and in terms of both electric and magnetic fields.

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