物理学是一门以实验为基础的自然科学 ,它本身也是一门很有趣的学科。可是 ,学生学起来常常反映难学 ,甚至不感兴趣。如何使他们对物理知识发生兴趣 ,促使他们积极主动地、心情愉快地学 ,确实是值得研究和探讨的问题。兴趣往往是学习的一种动力 ,生动形象的演示实验则是导致学 Physics is an experiment-based natural science, which itself is also a very interesting discipline. However, students often reflect difficult to learn, or even not interested. How to enable them to have an interest in physical knowledge and encourage them to actively and emotionally learn is indeed a question worthy of study and discussion. Interest is often a motivation to learn, vivid demonstration of the image is led to learn