谈 (初中 )光学仪器对光线的会聚作用与发散作用的教学

About the Teaching of the Convergence and the Divergence of Rays with the Optical Instruments in a Junior Middle School

就光学仪器对光线的会聚、发散的作用 ,从概念和判断方法上进行了讨论 .并对球面镜 ,凸凹透镜 ,以及平面镜对光线的会聚。

Discuss the concepts and the ways of judging about the convergence and the divergence of rays with the optical instruments.Analyse all kinds of the convergence and the divergence of rays on a spherical mirror,a concave and convex lens and a plane mirror