| 41. | Its refractive index is 1.406 at 20 �C.
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| 42. | Controlling the ratio of the elements allows precise control of refractive index.
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| 43. | Surely there is a comprehensive table somewhere with refractive indicies.
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| 44. | The dispersion of the refractive index is a fundamental property of matter.
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| 45. | Could there be some other form of focussing, refractive or otherwise?
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| 46. | The high refractive index makes them unsuitible for windows, for example.
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| 47. | The refractive index at 20 �C is 1.393.
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| 48. | They are attractive here for their small refractive index nonlinearity.
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| 49. | Why is yellow sodium light the reference point in determining refractive indices?
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| 50. | The refractive index is basic to the science of optics.
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