大学物理及物理实验课教师往往为无法在课堂上演示某些动态物理过程而苦恼.他们只得用粉笔在黑板上用“静态”图形来讲解动态过程.既费力,效果又不理想.例如:在讲到“振动的合成”这一内容时,需要演示两个互相垂直方向上振动的合成;实验中讲到示波器的扫波原理时,也需作类似的演示,曾有人以 University physics and physics teachers often distract from being able to demonstrate some of the dynamic physics in the classroom, and they have to use chalk on a blackboard to explain the dynamic process with “static” graphics, which is laborious and ineffective. Speaking of “the synthesis of vibration”, we need to demonstrate the synthesis of two vibrations perpendicular to each other. In the experiment, when we talked about the oscilloscope’s principle of sweeping, we also need to make a similar demonstration.