Answers

2014-03-31T11:53:42+05:30
No,it's just  ration of two speed of light in 2 media out of which one is vaccumm and other from where it will or has or is traveeling
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2014-03-31T14:59:23+05:30
Refractive index, n, have no units because they are ratios. They are the ratio of the speed light in a vacuum C, (~3x108m/s) to speed of light in the medium vm. Therefore: index n=C/Vm.
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