REFRACTIVE-INDEX OF WATER-LIKE FLUIDS

The refractive index of a waterlike fluid is calculated from a frequen cy- and wave-vector-dependent dielectric function. This model for the dielectric function of waterlike fluids as symmetric rotors is formula ted in terms of the self-part of the dipole-dipole correlation functio n and a static, wave-vector-dependent local-field factor. The dielectr ic response of the waterlike fluids has been generalized to take into account the vibrational degree of freedom of the atoms. We calculate t he refractive index of water-like fluids at the microwave-, infrared-, and optical-frequency region and compare it to the available experime ntal data.