more introduction. Explanation of polarization? Transmission of originally unpolarized light through two polarizers?

Light intensity \(I\) after passing through two polarizers at angles \(\theta_{1}\) and \(\theta_{0}\) is predicted to be

\begin{equation} I=I_{0}\cos^{2}[\theta_{1}-\theta_{0}]\\ \end{equation}

where \(I_{0}\) is the original light intensity.

An example for zero field is shown in Fig. \ref{fig:PolarizationDataAtZeroField}