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Rv. c does not appear in the equations prior to that point. |
→Mathematical description: Maybe this is clearer if moved inline. |
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:<math> \mathbf{E} ( \mathbf{r} , t ) = \left| \mathbf{E} \right| \mathrm{Re} \left \{ |\psi\rangle \exp \left [ i \left ( kz-\omega t \right ) \right ] \right \} </math>
:<math> \mathbf{B} ( \mathbf{r} , t ) = \hat { \mathbf{z} } \times \mathbf{E} ( \mathbf{r} , t ) ,</math>
where <math>k</math> is the [[wavenumber]], <math display=inline> \omega = c k</math> is the [[angular frequency]] of the wave propagating in the +z direction, and <math>
▲is the [[angular frequency]] of the wave propagating in the +z direction, and <math> c </math> is the [[speed of light]].
Here <math>| \mathbf{E} |</math> is the [[amplitude]] of the field and
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