# 物理学“狭义相对性原理”的准确表述

http://onlinelibrary.wiley.com/doi/10.1002/andp.19053221004/abstract

的截图。

（1）

Examples of this sort, together with the unsuccessful attempts to discover any motion of the earth relatively to the “light medium,” suggest that the phenomena of electrodynamics as well as of mechanics possess no properties corresponding to the idea of absolute rest. They suggest rather that, as has already been shown to the first order of small quantities, the same laws of electrodynamics and optics will be valid for all frames of reference for which the equations of mechanics hold good.1 We will raise this conjecture (the purport of which will hereafter be called the “Principle of Relativity”) to the status of a postulate, and also introduce another postulate, which is only apparently irreconcilable with the former, namely, that light is always propagated in empty space with a definite velocity c which is independent of the state of motion of the emitting body.

（2）

§ 2. On the Relativity of Lengths and Times

The following reflexions are based on the principle of relativity and on the principle of the constancy of the velocity of light. These two principles we define as follows:—

The laws by which the states of physical systems undergo change are not affected, whether these changes of state be referred to the one or the other of two systems of co-ordinates in uniform translatory motion.

§2 关于长度和时间的相对性

1 ．物理体系的状态据以变化的定律，同描述这些状态变化时所参照的坐标系究竞是用两个在互相匀速移动着的坐标系中的哪一个并无关系。

2。光速不变原理，在狭义相对论中，指的是无论在何种惯性系（惯性参照系）中观察，光在真空中的传播速度都是一个常数，不随光源和观察者所在参考系的相对运动而改变。这个数值是299,792,458 米/秒。

[1] A. Einstein，Zur Elektrodynamik bewegter Körper

Einstein, A. (1905), Zur Elektrodynamik bewegter Körper. Ann. Phys., 322: 891–921. doi: 10.1002/andp.19053221004

http://onlinelibrary.wiley.com/doi/10.1002/andp.19053221004/abstract

[2] On The Electrodynamics of Moving Bodies, By A. Einstein, June 30, 1905

http://www.fourmilab.ch/etexts/einstein/specrel/www/

[3] 爱因斯坦狭义相对论原文---《论动体的电动力学》

http://tieba.baidu.com/p/610391383

[4] 《论动体的电动力学》全文译文

http://blog.163.com/terrorist_1992/blog/static/106204601201062294311698/

[5] 沈惠川，2012-10-20，罗杰▪彭罗斯说，物理学从弦论量子力学

http://blog.sciencenet.cn/blog-605880-624403.html

[6]  2013-04-01，[请教] 类星体周围有静电场吗？

http://blog.sciencenet.cn/blog-107667-675940.html

[7] 2013-4-15，[请教] 物理基础：因果关系是否依赖观察者？

http://blog.sciencenet.cn/blog-107667-680338.html

Winston Churchill：

The farther backward you can look, the farther forward you can see.

http://blog.sciencenet.cn/blog-107667-915813.html

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