Abstract
A dual wavelength laser Mach–Zehnder interferometric technique is applied for measuring the absolute values of refractive index n and its thermo-optic coefficients d n/d T for paraffin wax. The values of n and d n/d T are used to calculate a number of the decisive thermo-optic properties. Applying Maxwell’s equation ( ε=n 2) the optical permittivity ε and its thermal coefficient d ε/d T, specific refraction, specific dispersivity, polarizability per unit volume and the ratio of atomic to electronic polarizabilities are calculated. On the other hand the optical dispersion d n/d λ and dielectric dispersion d ε/d λ are calculated according to Cauchy’s equation. Different important relationships between −d n/d T, −d n/d λ, −d ε/d T and d ε/d λ as a function of wavelength and other important constants are calculated and graphically represented.
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