Answers

2016-03-13T15:25:07+05:30
The definition of index of refraction is n = c/v
 The index of refraction for sapphire is sapphire is 1.77.
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2016-03-13T15:27:48+05:30
 sapphire refractive index is 1.77
speed = 3*10^8/1.77
           =1.69*10^8
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hope it helped
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