论文部分内容阅读
初中物理第二册第31页有一个用陀螺三色板演示白光的合成的小实验。学生自制陀螺三色板做实验后,我们发现如下问题:1.学生旋转陀螺的技术不易掌握,若制得不合要求陀螺就旋转不起来;2.陀螺底部若制成尖头,那么陀螺着地点总固定在一点,当陀螺轴有点倾斜时,就会产生进动,随着进动的加剧而越来越倾斜,不一会儿就触地停止;3.陀螺底部若制成圆头时,着地点在不断地移动,若着地表面不平滑,陀螺就会触地停止。学生针对上述问题,对这个小实验进行了改进,现介绍如下。
The junior high school physics volume second 31 page has a gyroscopic three-color plate to demonstrate the synthesis of small experiments. Students made the top three-color board to do the experiment, we found the following questions: 1. Students spinning top technology is not easy to grasp, if the system does not require gyroscope spin up; 2. Gyro bottom made of pointed, then the gyro with the location The total fixed at one point, when the gyro shaft tilted a little, it will have precession, with the precession of aggravating more and more inclined, and soon to touch the ground to stop; In constant movement, if the ground surface is not smooth, the top will touch to stop. Students for the above problems, this small experiment has been improved, are presented below.