- #1
Ryoukomaru
- 55
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When light passes through calcite crystal it splits into two rays, extra ordinary and an ordinary ray. Ordinary ray travels straight and extra ordinary ray is refracted. This would mean ordinary ray travels faster and e-ordinary ray travels slower because index of refraction is inversely proportional to speed. But somewhere (here) I read that calcite has an negative birefringence therefore ordinary ray travels slower. Can some1 explain this to me ?
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