How is the average energy density in an elect | vedclass

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(B) The energy density $u_B$ associated with a magnetic field $B$ in free space is given by the formula $u_B = \frac{B^2}{2 \mu_0}$.In an electromagne

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$\frac{B^2}{2 \mu_0}$

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(B) The energy density $u_B$ associated with a magnetic field $B$ in free space is given by the formula $u_B = \frac{B^2}{2 \mu_0}$.In an electromagnetic wave,the energy is shared equally between the electric field and the magnetic field.The average energy density associated with the magnetic field component is $\langle u_B \rangle = \frac{\langle B^2 \rangle}{2 \mu_0}$.Thus,the expression for the energy density in terms of the magnetic field is $\frac{B^2}{2 \mu_0}$.

How is the average energy density in an electromagnetic wave related to the magnetic field?

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