教材中设计的演示实验是纵观教材的深度、广度和关键所在而精心设计的,是多年中学物理教学的结晶。因此,下功夫把教材中的演示实验做好就显得极为重要。在演示实验中,教师本身要明确实验在本节课所要达到的目的,清楚实验的原理,并根据教材的要求和学生的实际适当地设计一些简单且能激发学生学习兴趣、效果又明显的实验,对于加深概念和规律的理解会起到 The demonstration experiment designed in the teaching materials is designed through the depth, breadth and key of the teaching materials. It is the crystallization of years of high school physics teaching. Therefore, it is extremely important to do a good job in demonstration experiments in the teaching materials. In the demonstration experiment, the teacher must clear the experiment to achieve the purpose in this lesson, understand the principle of the experiment, and according to the requirements of the teaching materials and the students’ actual conditions, design some simple and can stimulate students interest in learning, the effect is obvious experiment , To deepen the understanding of concepts and laws will play