文章基本信息

标题：How the laser helped to improve the test of special theory of relativity?
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作者：Satya Pal Singh
期刊名称：European Journal of Physics Education
电子版ISSN：1309-7202
出版年度：2013
卷号：4
期号：2
语种：English
出版社：Erciyes University
摘要：In this paper I have reviewed the test done for validating the special theory of relativity using masers and lasers in last one century. The first experimental verification for the isotropy of space for the propagation of light was done by Michelson-Morely in 1887. It has an accuracy of 1/100 th of a fringe shift. The predicted fringe shift on the basis of propagation of light through ether was 0.4 but Michelsion-Morley did not observe any fringe shift and came up with a negative result. Their experiment was repeated with modern and more sophisticated versions using highly monochromatic masers and lasers which have kept any ether drag to the limit of < 1/1000 th of the earth’s orbital velocity and validated the isotropy of the space to the extraordinary limit of one part in10 15 . The necessary discussion on masers, lasers, its properties and applications with brief definition of beats is also given in this paper for the completeness of the discussion apart of the experimental method for validating the constant speed of light in different directions using masers and lasers. Key words: Second relativity principle, isotropy of space, laser resonators, ether drag, Michelson-Morley experiment, Thorndike experiment, cryostat
关键词：Second relativity principle; isotropy of space; laser resonators; ether drag; Michelson-Morley experiment; Thorndike experiment; cryostat