This article introduces a new method of measuring the glass refractivity of a prism with a cross section in the shape of irregular triangle,namely measuring the glass refractivity of an irregular triangular prism with the method of vertical light incidence.

This article summarizes the character of isosceles right-angle prism of missile aiming system, gives the isosceles right-angle prism s reflection equation based on the law of reflection and the refraction of light beam in vector form,and analyzes the application to the ballistic missile aiming.

Studying the chromatic resolving power of prism by spectrometer;

Analysis of images caused by vertex angle of a prism and their application;

Explanation of Images Caused by Edges and Corners of Prism and Their Application;