ABSTRACT
The design of a laser microrefractometer that is suitable for temperature-dependent measurements is described. The refractive index of methylene iodide is measured in the temperature range of 22-92 °C for laser wavelengths covering almost the entire visible range of the spectrum: 442, 488, 515, 543, 594, and 633 nm. A detailed analysis of the temperature-related experimental error is made.
ABSTRACT
An interferometer is investigated in which the interacting beams undergo total internal reflection from a boundary surface with a variable relative refractive index. The high sensitivity of the change in the interference pattern with respect to small changes in the refractive index in the vicinity of the critical angle is theoretically proved and experimentally confirmed.
ABSTRACT
A simple method for comparing simultaneously the refractive indices of more than two liquids is described. The results from the measurement of the water solution of sucrose confirm the linear dependence of the refractive index on concentration. Accuracy of 0.001% is obtained experimentally.
ABSTRACT
A new simple method for determining the magnitude of the refractive index of small volumes of liquid is proposed. The results obtained are close to the expected within the accuracy of the goniometer utilized.
