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布朗运动是高中物理热学部分教学中的重点和难点,它间接地反映了分子是在永不停息地作无规则热运动这一事实。由于布朗运动的过程十分抽象,所以学生理解起来十分困难。为了更好地帮助学生理解这一物理现象,使他们更好地掌握分子运动理论的内容,笔者认为不仅需要借助物理模型的分析,更需要用实验加以演示。传统的布朗运动演示仪一般采取在显微镜下观察制作的玻片标本的方法,并将玻片标本中微粒的运动加以放大,从而实现观察的目的。通过对该原理的
The Brownian Movement is a key and difficult part of physics teaching in high school physics. It indirectly reflects the fact that the molecules are constantly moving with no heat. Due to the very abstract process of Brownian motion, students understand it very difficult. In order to help students better understand this physical phenomenon and make them master the content of molecular movement theory better, I think it is more necessary not only to analyze with physical model but also to experiment with it. The traditional Brown Motion Demonstrator generally adopts the method of observing the produced slide specimen under the microscope and amplifying the movement of the particles in the slide specimen so as to achieve the purpose of observation. Passing on this principle