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speed of light equation refractive index. This means that more the absolute refractive index more the speed of light. Where c is the speed of light in a vacuum and v is the velocity of light in the material.
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Speed of light in the 2nd Medium- v₂. Speed of Light in the 1st medium - v₁. This video shows how to calculate the speed that light will travel at in a material with a known value of refractive index.
The refractive index of a material is a measure of the change in the speed of light as it passes from a vacuum or air as an approximation into the material.
Refractive index of glassRefractive index of air Speed of light in airSpeed of light in glass Speed of light in air 321 2 10 8 3 10 8 ms 1 ii. Generally speaking if speed of light in vacuum is C and that in any other medium is C m then refractive index of that medium is n CC m. The RI formula here shows this relationship. The index ofrefraction is the ratio of the speed of light in vacuum c to thespeed of light in a particular medium v.
