新课程理念指出,学生的知识不是单纯通过教师的传授得到的,而是学生在一定的情境中,在教师的引导下自主构建的。因此,创设切合学生实际的物理问题情境,能使抽象的物理知识具体化,能激发学生的学习兴趣,进而产生探究的欲望和动机。实验在物理教学活动中有着极为重要的作用。一些有趣的、神奇的演示实验极易唤起学生的直觉兴趣(好玩),从而逐步过渡 The concept of the new curriculum points out that students’ knowledge is not obtained through the teaching of teachers alone, but students are self-constructed under the guidance of teachers in certain situations. Therefore, to create a situation that meets the students ’actual physical problems can make the abstract physical knowledge concrete and inspire students’ interest in learning, which in turn leads to the desire and motivation of inquiry. Experiments in physics teaching activities has a very important role. Some interesting, magical demo experiments can easily arouse students’ instinctive interest (fun) and thus gradually transition