how are optical and reflective index of a medium related to each other ?
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We can say that optical density is directly proportional to refractive index and inversely proportional to speed of light for that given medium. Complete Answer: Absolute refractive index is defined as the ratio of speed of light in vacuum to that in a given medium.
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Refractive index compares the speed of light in a particular medium with the speed of light in vaccum. It measures the optical density of a medium. It should not be confused with the mass density of the medium. For turpentile oil, it's mass density is less than water but optical density is more than that of water.
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