The Faraday Effect is a magnetoptical effect in which
a plane of polarized light is rotated as it passes through a medium that is in a magnetic field. The amount of rotation
is dependent on the amount of sample that the light
passes through, the strength of the magnetic field and
a proportionality constant called the Verdet Constant.
The Verdet constant is the proportionality constant between
the angle of rotation of plane polarized light and
the product of the path length l through the sample and
the applied magnetic field B. More explicitly, the Verdet
constant is the proportionality constant in Eq.