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布朗运动实验对花粉微粒大小和观测设备的要求较高,演示实验很难在课堂中完成.另外,即使学生能通过显微镜观察到实验现象,微粒大小的数量级是多少?不同水温时、微粒大小不同时微粒运动剧烈程度的差别等问题也很难反映出来,从而影响了教学效果.为解决上述问题,笔者经过多次尝试,找到了一种演示布朗运动现象、验证相关实验规律的简便方法.一、实验器材鸵鸟牌碳素墨水、广告画颜料、瓜叶菊花粉、数码显微镜及其配套图像处理软件、载玻片、盖玻片、蒸馏
In Brownian motion experiments, the particle size of the pollen and the equipment required for the observation are so high that it is very difficult for the demonstration experiment to be completed in the classroom. In addition, what is the magnitude of the particle size even if the student can observe the experimental phenomena through the microscope? At the same time, the problems such as the difference of the degree of particle movement are difficult to be reflected, so the teaching effect is affected.In order to solve the above problems, the author has found a simple way to demonstrate Brownian motion and validate the related experimental rules. , Experimental equipment ostrich brand carbon ink, advertising paint, cineraria pollen, digital microscope and its accompanying image processing software, slides, cover slips, distillation