随着中小学教育改革的不断深入,电教媒体已成为教学中的一种有效手段,它以在课堂教学中的独特优势被教师广泛应用。实验教学往往是物理课堂教学的重点、关键,直接影响课堂教学质量。但有时演示实验因实验环境、器材本身的局限,无法直接让全班学生都观察清楚操作过程及实验现象, With the continuous deepening of primary and middle school education reforms, audio-visual education media has become an effective means of teaching. It is widely used by teachers because of its unique advantages in classroom teaching. Experimental teaching is often the key and key to physics classroom teaching, which directly affects the quality of classroom teaching. However, due to the limitations of the experimental environment and the equipment itself, demonstration experiments may not directly allow the entire class to observe clearly the operation process and experimental phenomena.