教授“光的衍射”时,我们经常用“只闻其声不见其人”来说明声波比光波更容易衍射。这样讲授,尽管学生能感受和理解只闻其声不见其人的物理情景,但毕竟不能身临其境。一次又讲到这个问题时,恰好听到隔壁课室教师上课的声音,我突发灵感,立刻对原有教学进行了重新设计:我有意停顿 When teaching “diffraction of light,” we often use the phrase “only hear people whose voices are not seen” to illustrate that sound waves are more easily diffracted than light waves. In this way, although students can feel and understand only the physical scenes that their voices are not seen, they cannot be immersed in the scene. When I talked about this issue again, I heard the sound of classroom teachers next door. I was inspired and immediately redesigned the original teaching: I deliberately paused.