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.
