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double refraction
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double refraction

In a crystal, when an unpolarized ray of light entering the crystal is split into two polarized rays, one of which does obey Snell's law of refraction, and the other does not. By looking through such a crystal, for example calcite, one can ‘see double’.
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Birefringence or optical anisotropy is a phenomenon, which arises when polymer chains become aligned along the fiber axis, which is purpose of optimum DR of post-spin, drawing stage.
On the physical behavior of isotactic polypropylene fibers extruded ... by El-Dessouky, Hassan M.; Mahmoudi, Mohammad R.; Lawrence, Carl A.; Yassien, Khaled M.; Sokkar, Taha Z / Polymer Engineering and Science
In the past year, the industrial process used to grow these artificial diamonds-chemical vapor deposition-has greatly improved, allowing the synthesis of crystals with a lower birefringence (less likely to split apart an incoming beam of light).
Diamonds are a laser's best friend by Asian News International
This technique of Blu-ray solves the problem of birefringence.
Intelligent Blu-Ray Disk Technology by Tape4backup / Computers and Internet community
 
 
 
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