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arXiv 1507.05604physics.ed-ph
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学生在电动力学中遇到的边界条件困难

Student difficulties with Boundary Conditions in electrodynamics

Qing X. Ryan, Steven J. Pollock, Bethany R. Wilcox

摘要:

边界条件是高等物理专业本科生必须掌握和应用的一个重要课题。我们报告的调查结果,从学生的困难,使用边界条件(BCs)电动力学。我们的数据来源包括学生对传统考试问题的回答,概念调查问题和有声思维访谈。该分析是由一个分析框架,其特点是学生如何激活,构建,执行,并反映边界条件。常见的学生困难包括:在适当的上下文中激活边界条件;构建E&M波的复杂表达式;数学简化复指数并检查反射和透射系数是否是物理的。我们还提出了潜在的教学影响,根据我们的观察。

英文摘要:

Boundary conditions (BCs) are considered as an important topic that advanced physics under- graduates are expected to understand and apply. We report findings from an investigation of student difficulties using boundary conditions (BCs) in electrodynamics. Our data sources include student responses to traditional exam questions, conceptual survey questions, and think-aloud interviews. The analysis was guided by an analytical framework that characterizes how students activate, con- struct, execute, and reflect on boundary conditions. Common student difficulties include: activating boundary conditions in appropriate contexts; constructing a complex expression for the E&M waves; mathematically simplifying complex exponentials and checking if the reflection and transmission co- efficient are physical. We also present potential pedagogical implications based on our observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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