振动图象的直接描绘

• 作 者: 赵凤义
• 机 构: 辽宁省建昌县完全中学,
• 出 处: 物理教学
• 发表日期: 1984年10期
• 关键词: 振动图 物理教材 细砂 断条 如水 细圆 漏下

关于振动图象的直接描绘,中学物理教材中介绍的方法是用漏斗装满细砂并使它摆动,在漏斗的下方沿着跟摆动垂直的方向匀速拉动一硬纸板,这样就在硬纸板上得到了由细砂描绘出的振动图象(以下把这种实验装置简称做“砂摆”)。我认为这个实验存在一些缺点,因而对此实验做了改进。

With regard to the direct depiction of vibratory images, the method described in the middle school physics textbook is to fill the fine sand with a funnel and swing it, and pull a cardboard at a uniform speed in the direction perpendicular to the swing under the funnel, so that it is on cardboard. The vibration image depicted by the fine sand was obtained (hereinafter, this experimental apparatus was abbreviated as “sand pendulum”). I think there are some shortcomings in this experiment, so I improved this experiment.