Visualizing motion in potential wells
Visualizing motion in potential wells
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可视化势井中的运动
DOI：
10.1119/1.18808
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发表时间：
1998
影响因子：
0.9
通讯作者：
A. Dimitrova
中科院分区：
文献类型：
--
作者：
P. Jolly;D. Zollman;N. S. Rebello;A. Dimitrova
势能图的概念在量子物理的研究中具有重要的基础意义。然而，学生很少在入门课程中接触到这种强大的替代描述，因此当他们在初级量子课程中遇到它时，很难理解它的意义。我们描述了一个学习单元，它结合了一系列使用动力学或空气轨迹系统的计算机接口实验。本单元旨在使势能图的学习不那么抽象。学生们首先使用速度数据和假设能量守恒来构建调和势图或平方势图，或者用受弹簧约束的物体的弹性相互作用的力-位移图或从弹性块上弹跳。然后，他们研究了骑手磁铁与磁场磁铁结构相互作用的运动，并使用磁场传感器直接绘制了势能图。测量的便利性允许exp…
The concept of potential-energy diagrams is of fundamental importance in the study of quantum physics. Yet, students are rarely exposed to this powerful alternative description in introductory classes and thus have difficulty comprehending its significance when they encounter it in beginning-level quantum courses. We describe a learning unit that incorporates a sequence of computer-interfaced experiments using dynamics or air-track systems. This unit is designed to make the learning of potential-energy diagrams less abstract. Students begin by constructing the harmonic or square-well potential diagrams using either the velocity data and assuming conservation of energy or the force-displacement graph for the elastic interaction of an object constrained by springs or bouncing off springy blocks. Then, they investigate the motion of a rider magnet interacting with a configuration of field magnets and plot directly the potential-energy diagrams using a magnetic field sensor. The ease of measurement allows exp...