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现行高中物理教材[1]思考与讨论栏目中的扩散现象实验是高中物理教学中的一个传统经典实验(如图1所示)。但笔者通过多年教学实践发现,该实验尽管实验方法简单、现象明显,但存在两点不足:其一,实验中所用气体是棕红色的有毒二氧化氮气体,实验时容易外逸,污染室内空气,影响师生健康,不利于培养学生的环境意识;其二,作为物理教师,制备二氧化氮气体难度较大,不仅
Current High School Physics Textbook [1] Reflections and Discussion Part of the diffusion experiment in high school physics teaching is a classic experiment (Figure 1). However, through many years of teaching practice, the author found that although the experimental method is simple and the phenomenon is obvious, there are two deficiencies: First, the gas used in the experiment is brown-red toxic nitrogen dioxide gas which is easy to escape when experimenting and pollutes the indoor air , Affecting the health of teachers and students, is not conducive to cultivating students’ environmental awareness; Second, as a physical teacher, preparation of nitrogen dioxide gas more difficult, not only