Cold-plasma right-handed wave
= Cold-plasma right-handed wave
{title2=$n^2=R=S-g$}
For propagation along $+\mathbf B_0$, use $e^{ikz-i\omega t}$ and $\epsilon_{xy}=ig$. This transverse <electromagnetic wave> has $E_y=iE_x$ and <refractive index> $n^2=S-g$. Its real <electric field> rotates in the sense of <electron> gyration. With immobile <ions> and positive <electron> <cyclotron frequency> magnitude $\Omega_e$, $R=1-\omega_{pe}^2/[\omega(\omega-\Omega_e)]$.