41. ADP is a widely used crystal in the field of optics due to its birefringence properties. 42. Gabrielite has very weak anisotropism which is the reason why gabrielite shows little to no birefringence . 43. The birefringence is generally weak in air, but stronger when bursaite is immersed in oils. 44. The best constraints on Lorentz violation come from constraints on birefringence in light from astrophysical sources. 45. They can appear in glasses or polycrystals that have been made anisotropic by stress-induced birefringence . 46. In the simplest form, uniaxial birefringence , there is only one special direction in the material. 47. That novel also prominently discusses the birefringence of Iceland spar, an optical phenomenon that Gibbs investigated. 48. The theory of Huygens was not accepted, by some, because longitudinal waves cannot show birefringence . 49. The induced birefringence demonstrates the highly ordered molecular structure of the elastin molecules in the elastic fiber. 50. In other words, the interference figure presents all possible birefringence colours for the mineral at once.
