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Some subtle concepts in fundamental physics

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In this paper, we discuss some subtle concepts, such as coordinate, measurement, simultaneity, Lorentz‐FitzGerald contraction, and singularity in fundamental physics. The explanations of these concepts in textbooks are usually incomplete and lead to puzzles. Some long-standing paradoxes such as the Ehrenfest one are caused by misinterpretation of these concepts. The analysis shows that all these concepts have simple and naive meanings and can be well understood by using a suitable logical procedure. The discussion may shed light on some famous paradoxes and provide some new insights into the structure and features of a promising unified field theory.
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Keywords: Energy; Entropy; Simultaneity; Singularity

Document Type: Research Article

Publication date: December 7, 2017

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  • Physics Essays has been established as an international journal dedicated to theoretical and experimental aspects of fundamental problems in Physics and, generally, to the advancement of basic knowledge of Physics. The Journal's mandate is to publish rigorous and methodological examinations of past, current, and advanced concepts, methods and results in physics research. Physics Essays dedicates itself to the publication of stimulating exploratory, and original papers in a variety of physics disciplines, such as spectroscopy, quantum mechanics, particle physics, electromagnetic theory, astrophysics, space physics, mathematical methods in physics, plasma physics, philosophical aspects of physics, chemical physics, and relativity.
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