Abstract
Knowledge of variations in the optical properties of liquids with pressure is required in ultrasonic-light interaction studies. One parameter used to describe these variations is the piezooptic coefficient, defined as the change in refractive index produced by a unit change in the applied pressure. The relative adiabatic piezooptic coefficients of numerous pure liquids and alcohol-water mixtures were determined from measurements made on light diffracted by pulsed ultrasonic waves. Absolute values of this parameter for the liquids tested were calculated from a consideration of experimental values previously determined and the results compared with the theoretical and empirical formulas presently used to compute this parameter. [Research sponsored by the Office of Naval Research.]
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