今秋使用的初中物理第二册,是吸取了各地使用原试用本的经验,根据《全日制六年制不分科的重点中学物理教学大纲》改编的。同试用本相比,本册物理在内容和体系上主要的变动有:①将一些定量要求较高、初中学生较难理解的知识移到高中讲授。如几何光学中的折射率、全反射、凸透镜公 The second volume of junior high school physics used in this fall is the experience of using the original trials in various places. It was adapted from the syllabus of the physics of key middle schools in the full-time six-year system. Compared with the trial version, the main changes in the content and system of this book are: 1) Transfer some knowledge with high quantitative requirements and junior high school students’ understanding to high school. Such as refractive index in geometrical optics, total reflection, convex lens