| 1. | This is called birefringence or optical anisotropy.
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| 2. | If the optical anisotropy is 0, this generally indicates that the scattering is isotropic.
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| 3. | The apparent effects are : band gap reduction, valence band splitting, and optical anisotropy.
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| 4. | Many crystals are anisotropic to light ( " optical anisotropy " ), and exhibit properties such as birefringence.
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