Measuring the refractive index of a methanol - water mixture
according to the wavelength
Authors: Nguyen Tien Dung, 1 Le Canh Trung,1 Nguyen Duy Cuong,2 Ho Dinh Quang,1 Dinh Xuan Khoa,1 Nguyen Van Phu,1 Chu Van Lanh,1 Nguyen Thanh Vinh,1 Do Thanh Thuy1 and Bui Dinh Thuan
PHOTONICS LETTERS OF POLAND, VOL. 13 (1), 10-12 (2021)
: :
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.
