论文部分内容阅读
高中物理必修教材171页布朗运动须在显微镜下进行观察,这对课堂教学带来不便.用激光、烧杯、蒸馏水、热水、少许淀粉,在课堂进行演示实验,简单易做,一试成功。在500毫升烧杯内盛适量蒸馏水,靠近激光器窗口,让激光能沿着烧坏直径方向透过杯内蒸馏水,光斑落在2米外的屏幕上或教室内粉墙上.由于蒸馏水中无布朗微粒,观察到的只是一个很平静的光斑(因为分子运动须在超显微镜下才能观察到.这一实验过
High school physics required textbooks 171 pages Brownian movements must be observed under the microscope, which brings inconvenience to the classroom teaching. Using lasers, beakers, distilled water, hot water, a little starch, demonstration experiments in the classroom, easy to do, a successful test. Place a suitable amount of distilled water in a 500 ml beaker, close to the laser window, and allow the laser to pass through distilled water in the cup along the diameter of the burn. The light spot falls on the screen 2 meters away or in the classroom. Since there is no brown particles in the distilled water, Only a very calm spot was observed (because the molecular motion must be observed under a supermicroscope. This experiment has been