初三物理教学中要讲到太阳能的开发和利用。为了增强教学效果,我制作了一个太阳能演示器。演示时只要将这种演示器放到太阳光底下,它就能发出宏亮的电笛声,避开太阳光电笛声就会停止,从这种演示中学生可明显看到太阳能的作用,激发学生们学习这部分知识的兴趣,起到了较好的教学效果.下面就向你介绍一下 In the third physics teaching, we must talk about the development and utilization of solar energy. In order to enhance the teaching effect, I made a solar demonstrator. When the demo is placed under the sun, it can emit a loud whistle and avoid the solar phoenix. From this demonstration, students can clearly see the effect of solar energy and inspire students. The interest in learning this part of the knowledge has played a good teaching effect. The following will introduce you to