光的反射定律是学习光学知识的基础 ,在学习中应把握以下要点 :第一 ,定律中的空间想象。初二学生未接触过空间概念 ,空间想象能力弱 ,对“在同一平面上”和“不在同一平面上”可能觉得比较抽象 ,不太好理解。为了理解起来更直观、具体 ,可以采用下面的简便方法 :先找一张硬纸 The law of light reflection is the basis for learning optical knowledge. The following points should be grasped in learning: First, the spatial imagination in the law. The students of the 2nd grade did not come into contact with the concept of space, but they had weak spatial imagination. They may be more abstract and less understanding of “in the same plane” and “not on the same plane.” To understand it more intuitively and specifically, you can use the following simple method: Find a hard paper first