Pola? se collection by refractionWhen the light passes into the glass, the light will move with the same speed in all directions because the glass has a refractive index one, but when the light passes into the crystalline calcite or quartz. The light is not the same speed in all directions, hence the light through a calcite, thus there are two vertical refraction (birefringence or double diffraction) as two vertical refraction rays as light a la rise with an electric Ray refraction each perpendicular rays. Which is represented by the arrows and rays instead. Called simple (ordinary ray) radiation has the same speed in all directions. Radiation that is represented by the arrow, called special (extraordinary ray) radiation with different speed in the crystals.A different direction
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