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摘要:
The twins or clock paradox has been a subject of lively discussion and occasional disagreement among both relativists and the public for over 100 years, and continues to attract physicists who write papers giving new analyses or defending old ones, even though many physicists now consider the matter only of educational interest. This paper investigates the number of papers, which is increasing, and trends in explanations, some of which are now targeted at professional physicists and other of which are targeted at optical or radar visualization rather than problem solving. Observations of students indicate that the latest techniques help but only somewhat. An analysis is made of 21 previous treatments appearing in the education related American Journal of Physics, Einstein’s discussions and several other pedagogical papers. A new memory aid for simultaneity transformation is given that puts it on a par with “time dilation” and “length contraction” for quick and easy problem visualization. The point of view of a trailing twin is introduced to show how simultaneity changes account for missing time in the turnaround. Length contraction is treated on equal footing with time dilation, and Swann’s insight into clocks is extended to lengths. Treatments using the conventionality of simultaneity are seen as equivalent to choice of co-moving frames. Responses to difficult questions are suggested which avoid being dismissive, and engage students’ critical thinking.
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篇名 The Twins Clock Paradox History and Perspectives
来源期刊 现代物理(英文) 学科 医学
关键词 CLOCK PARADOX Length Contraction SIMULTANEITY Special RELATIVITY Time DILATION TWINS PARADOX
年,卷(期) 2014,(12) 所属期刊栏目
研究方向 页码范围 1062-1078
页数 17页 分类号 R73
字数 语种
DOI
五维指标
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研究主题发展历程
节点文献
CLOCK
PARADOX
Length
Contraction
SIMULTANEITY
Special
RELATIVITY
Time
DILATION
TWINS
PARADOX
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
现代物理(英文)
月刊
2153-1196
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
1826
总下载数(次)
0
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