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初中《物理》第二册第9页图1—8所示演示平面镜成像的实验,得出的规律很重要,然而,教学实践发现该实验美中不足之处有:1、可见度小。教师演示,学生看不清楚。2、一般无色玻璃在背景光线充足的情况下,透光性好,反光性差。做实验时必须拉上窗帘,实验完毕还须拉开,影响课堂教学的完整性。3、蜡烛竖立不稳,易倾倒,操作不便。我在教学中作了如下改进:1、改教师演示实验为学生实验,发给每位学生一套器具,人人动
The experiment of demonstrating plane mirror imaging in the second grade of the “Physics” of junior high school is shown in Fig. 1-8. The obtained rule is very important. However, the teaching practice found that the shortcomings of the experiment are: 1. Little visibility. Teachers demonstrate that students can’t see clearly. 2. In general, the colorless glass has good light transmittance and poor light reflectance when the background light is sufficient. The curtains must be pulled up during the experiment and must be pulled open after the experiment is completed, which will affect the integrity of the classroom teaching. 3, the candle is unstable, easy to dump, inconvenient operation. I made the following improvements in my teaching: 1. I changed the teacher’s demonstration experiment into a student’s experiment and sent each student a set of utensils.