演示实验是物理课堂教学中深受学生喜爱的一种教学形式,它可以化枯燥的理论为有趣的现象,化抽象的概念为具体的情景,它是上好物理课、吸引学生注意的重要手段。但要做好演示实验,必须要有一定的物质条件,其中最重要的是演示器材的添置。因陋就简、变废为宝、土法上马、自制教具应该是物 Demonstration experiment is a kind of teaching form which is popular among students in physics classroom teaching. It can turn boring theory into interesting phenomenon and abstract concept into specific situation. It is an important means to improve physical class and attract students’ attention . However, to do a good demonstration experiment, we must have certain material conditions, of which the most important one is the purchase of demonstration equipment. Because of humble, turning waste into treasure, native law launched, self-made teaching aids should be things