| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for measuring a refractive index capable of highly accurately measuring an apparent refractive index of a colloid liquid.SOLUTION: P-wave light having a narrow spectral width which is suitable for refractive index measurement is made incident on the surface of a colloid liquid, an incident angle &thetas;is obtained which is minimized in intensity of non-scattered reflection light from the surface of the colloid liquid, and based on the incident angle &thetas;, and a refractive index nof gas in contact with the surface of the colloid liquid, an apparent refractive index nof the colloid liquid is obtained. |
