Relating to or causing birefraction; having the property of splitting light into two refracted rays.
Adjective form derived from 'birefraction' (Latin 'bi-' + 'refractive'). The term describes materials and optical systems showing double refraction properties.
Birefraction creates stunning natural effects—the aurora borealis and mirages are enhanced by birefraction in ice crystals and atmosphere layers, which is why understanding this property helps meteorologists predict unusual optical phenomena.
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