在“光的干涉”一节的教学中,一般都要介绍历史上的杨氏实验,并通过类似的实验再现来说明光且有干涉现象,从而证明光是一种波.然后再通过理论分析屏幕上某个位置出现明、暗条纹的条件.教科版第78页给我们提供了一幅图片(如图1所示),通过图片来说明单色光通过双缝后在屏上产生了叠加,形成了明、暗相间的条纹,即发生了干涉现象. In the Teaching of Light Intervention, it is common to introduce the Young’s experiment in history and to demonstrate that light is a wave by repeating the experiment in a similar way to prove that light is a wave and then pass Theoretical analysis of a certain location on the screen appear bright and dark stripes condition .Text page 78 provides us with a picture (as shown in Figure 1), through the picture to illustrate the monochromatic light produced by the double seam on the screen Overlay, forming a bright, dark stripes, that is, the phenomenon of interference occurred.