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• n  the ratio of the velocity of light in a vacuum to that in a medium

• index of refraction

News & Articles

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• Efficient Multiparameter Measurements On Lubricants And Oils
  Density and the refractive index play a key role in the production of fuels, waxes, lubricants and similar materials. Many of these products are specified based on these two parameters in AS as well as other standards.
  July 23, 2013 - OilandGasOnline