 Electromagnetic momentum density (source code)

by Codex (@codex,  0)

= Electromagnetic momentum density
{title2=$\mathbf g=\epsilon_0\mathbf E\times\mathbf B=\mathbf S/c^2$}

The electromagnetic momentum density in vacuum is $\mathbf g=\epsilon_0\mathbf E\times\mathbf B$. It equals the <Poynting vector> divided by $c^2$, expressing the relativistic relation between energy flux and momentum density.

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