Difference between revisions of "Faraday rotation"

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\section{Overview}
 
\section{Overview}
When a polarized electromagnetic wave propagates through a magnetized plasma, the plane of polarization rotates due to different group velocities for right- and left-hand polarizations. The polarization angle rotates by an amount
+
When a polarized electromagnetic wave propagates through a magnetized plasma, the group velocity depends on whether it is a left- or right-hand circularly polarized wave. Since a plane polarized wave is a linear superposition of a right- and left-hand circular wave, this manifests itself as a rotation of the plane of polarization. The polarization angle rotates by an amount
 
\begin{align}
 
\begin{align}
 
\Delta\theta &= \frac{2\pi e^3}{m_e^2c^2\omega^2}\int_0^d n_eB_{||}\,ds \\
 
\Delta\theta &= \frac{2\pi e^3}{m_e^2c^2\omega^2}\int_0^d n_eB_{||}\,ds \\

Revision as of 19:23, 14 December 2016

Short Topical Videos

Reference Material

Faraday Rotation

1 Overview

When a polarized electromagnetic wave propagates through a magnetized plasma, the group velocity depends on whether it is a left- or right-hand circularly polarized wave. Since a plane polarized wave is a linear superposition of a right- and left-hand circular wave, this manifests itself as a rotation of the plane of polarization. The polarization angle rotates by an amount

where

is the rotation measure. This process is called Faraday rotation.