Abstract- In the first part of this paper, the formulation of light propagation in a birefringent medium with orthogonal optical axes is obtained. Then, the lows of reflection and refraction in a plane interface between an isotropic medium and a birefringent medium are extracted. In continuation, the reflection and refraction of light and existence of Brewster and critical angles for all incidence angles from the isotropic medium is numerically investigated. It is shown that Brewster and critical angles are dependent on incident direction.

Keywords: Propagation, Reflection, Refraction, Brewster Angle, Critical Angle, Birefringent Medium.

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