Calcite [CaC03] is a crystal with abnormally large birefringence. The index of refraction for light with electric field parallel to the optical axis (called extraordinary waves or e-waves} is 1.4864. The index of refraction for light with electric field perpendicular to the optical axis (called ordinaryr waves or 0- waves] is 1.6584. Find the critical angle {producing total internal reflection) for o-waves in calcite leaving the block of calcite into air. Express your answer in degrees to four significa nt figures