三棱镜是分光镜的主要元件之一,在几何光学中有着重要地位,其主要作用是改变光的传播方向(即折光).然而现行教材对三棱镜折光的介绍却很有限,这就会影响学生对三棱镜折光的理解和认识.为此,我们在教学中有必要就以下几个问题给学生以澄清和说明(以下假定三棱镜周围介质是空 Prism is one of the main components of the spectroscope. It plays an important role in geometric optics. Its main function is to change the direction of light propagation (ie, refractive index). However, the introduction of prismatic refraction in current teaching materials is very limited, which will affect the students’ The understanding and understanding of prism prismatic refraction. To this end, we need to give students clarification and explanation on the following questions in the teaching (The following assumes that the medium surrounding the prism is empty