《光的折射》是《光现象》之后《光的折射透镜》之前,本节的知识结构并不复杂,但它却负担着两章内容之间承前启后的重任,所以地位举足轻重.本节课的重点是探究光的折射规律,因为光的折射规律是后面理解透镜成像的基础,所以,做好实验,让学生了解光的折射现象及折射规律是本节课的重点.本节课的难点在于如何把生活中不为人注意的光的折射现象用生动有趣的方法表达出来,让学生在学到知识的同时懂得如何运用知识,并且提高学习的积极性, Before the “light refraction” after the “light phenomenon” before “light refraction lens”, the knowledge structure of this section is not complicated, but it is bearing the heavy burden of bearing on the contents of the two chapters, so the status is pivotal. The focus is to explore the law of light refraction, because the law of refraction of light is to understand the basis of lens imaging, so do a good experiment, so that students understand the phenomenon of refraction and refraction of light is the focus of this lesson. How to express the refracted phenomenon of unnoticed light in life with vivid and interesting ways to let students know how to use knowledge while learning knowledge and improve the enthusiasm of learning,