The energy density associated with electric field $\vec{E}$ and magnetic field $\vec{B}$ of an electromagnetic wave in free space is given by $\left(\epsilon_{0}-\right.$ permittivity of free space, $\mu_{0}-$ permeability of free space)
Solution
<p>The energy density associated with the electric field $\vec{E}$ and magnetic field $\vec{B}$ of an electromagnetic wave in free space is given by:</p>
<p>For the electric field:
$U_{E} = \frac{1}{2} \epsilon_{0} E^2$</p>
<p>For the magnetic field:
$U_{B} = \frac{1}{2} \frac{B^2}{\mu_{0}}$</p>
<p>These expressions match Option A:</p>
<p>$U_{E} = \frac{\epsilon</em>{0} E^{2}}{2}, U_{B} = \frac{B^{2}}{2 \mu</em>{0}}$</p>
About this question
Subject: Physics · Chapter: Electromagnetic Waves · Topic: Maxwell's Equations
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