DISCUSSION ON THREE METHODS OF MEASURING REFRACTIVE INDEX OF PRISM

Refractive index is not only related to geometric optics, but also closely related to wave optics, and its measurement methods are varied. In order to study the influence of different methods on the accuracy of refractive index measurement, the refractive index of a prism is measured by three different experimental methods, including grazing method, minimum deviation angle method and Brewster angle method. The refractive index was analyzed and compared. The experimental results show that compared with Brewster angle method, the grazing method and minimum deviation angle method are more accurate in measuring the refractive index.This paper provides an experimental method for accurate measurement of refractive index of prism.