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1. To observe Faraday effect in this lab, which says that the rotation of plane of polarization of light changes when applying a magnetic field:  \begin{equation}  %\label{}  I=I_{0}cos^{2}(\theta_1−\theta_0) I=I_{0}cos^{2}(\theta_1−\theta_0-\phi(B))  \end{equation}  where $I_{0}$ is the intensity of the light after passing through the first polarizer and I is the light intensity passing through both polarizers at angles $\theta_{1}$ and $\theta_{0}$.  %\newline