# Illustration Brewster's Angle during Reflection of Light

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If unpolarized light falls under the Brewster's angle (polarization angle) $$\varphi_{\text B}$$ on the interface of two dielectric media (e.g. air and glass) with the refractive indices $$n_1$$ and $$n_2$$, then the reflected light is completely linearly polarized perpendicular to the plane of incidence (s-polarization). The transmitted light, on the other hand, is only partially linearly polarized.