Relationship between density and refractive index of a medium

  • #1
What is the relationship (a mathematical one) between the density and the refractive index of a medium?
 

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  • #2
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1
What is the relationship (a mathematical one) between the density and the refractive index of a medium?

For a given composition of material, the index n at a given wavelength is proportional to density ρ - actually the difference (n-1) is proportional to ρ, since n can be less than 1. But there's a LOT more to calculating the refractive index of a given material at a given wavelength than just it's density.
 

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