Measuring the refractive index of a methanol - water mixture according to the wavelength
Authors: Nguyen Tien Dung, Le Canh Trung, Nguyen Duy Cuong, Ho Dinh Quang, Dinh Xuan Khoa, Nguyen Van Phu, Chu Van Lanh, Nguyen Thanh Vinh, Do Thanh Thuy, Bui Dinh Thuan
Photonics Letters of Poland
: 13 : 10-12
Publishing year: 3/2021
The refractive index of a methanol-water mixture depending on the wavelength at different concentrations was determined by our experimental method using a Michelson interferometer system. A comparative study of Gladstone-Dale, Arago–Biot and Newton relations for predicting the refractive index of a liquid has been carried out to test their validity for the methanol-water mixture with different concentrations: 30%, 40%, 50%, 60%, 80%, and 100%. The comparison shows a good agreement between our experimental results and the results in the expressions studied over a wavelength range approximately from 450 to 850 nm
