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Refractive index is an intensive property of physical chemistry whose value is independent of the quantity of matter containing in the system. The measurement of refractive index and optical activity of organic liquids is of great important in physical chemistry. Specific refractive index of selected sets of organic binary mixture are calculated by Lorentz & Lorenz formula, and suggested DDJ formula of specific refractive index, the data with very little difference confirming that the applicability of the suggested DDJ formula is comparable to those of Lorentz & Lorenz.

Studies of Derived Specific Refractive Index Formula for Binary Organic Mixture and Compare with Lorentz & Lorenz Formula