CAJ | 학술논문

本文阐明了双程(回路)光速的数值可以由实验直接给出，但是单向光速的数值不能由实验获得而只能通过单向光速各向同性的假设使之等于双程光速的数值。有了这个(假定的)单向光速的数值就可以同步惯性系中的所有时钟，因而定义了惯性系的时间坐标，正是由于这种同时性定义，爱因斯坦才进而发现了狭义相对论。迄今为止所有测量光速的实验给出的都是双程而非单程光速的数值。为了从理论上阐述单程光速无法测量，我们介绍了爱德瓦兹同时性，它是使用双程光速不变而单程光速任意的假设来定义的；同时给出了与之相应的爱德瓦兹变换，进而讨论了这种同时性与爱因斯坦同时性的关系。通过时间膨胀和长度收缩效应阐明了二者在物理上是等价的，也就是说单向光速的效应在实验中不会显现。
본문천명료쌍정(회로)광속적수치가이유실험직접급출，단시단향광속적수치불능유실험획득이지능통과단향광속각향동성적가설사지등우쌍정광속적수치。유료저개(가정적)단향광속적수치취가이동보관성계중적소유시종，인이정의료관성계적시간좌표，정시유우저충동시성정의，애인사탄재진이발현료협의상대론。흘금위지소유측량광속적실험급출적도시쌍정이비단정광속적수치。위료종이론상천술단정광속무법측량，아문개소료애덕와자동시성，타시사용쌍정광속불변이단정광속임의적가설래정의적；동시급출료여지상응적애덕와자변환，진이토론료저충동시성여애인사탄동시성적관계。통과시간팽창화장도수축효응천명료이자재물리상시등개적，야취시설단향광속적효응재실험중불회현현。
The paper expounds the value of the two-way (loop)speed of light can be given di-rectly by experiment,however value of the one-way speed of light cannot be obtained by ex-periment but only through assuming isotropy of one-way speed of light to make it equal to the value of the two-way speed,and the (assumed)value was used to synchronize all clocks and hence the coordinate time is defined in the inertial system,it was because the definition of sim-ultaneity Einstein then developed the special theory of relativity.So far the value of the light speed given by all the experiments is that of the two-way rather than the one-way speed.In order to theoretically explain the one-way speed of light cannot be measured,we introduce Ed-wards'simultaneity defined by the assumption of the invariance of the tow-way light speed re-gardless of any assumptions concerning the one-way speed,at the same times give the corre-sponding Edwards transformation,and then discuss relationship between this simultaneity and Einstein simultaneity.The effects of time dilation and length contraction show that the two types of the definitions for simultaneity are physically equivalent,in other wards any effect of the one-way speed of light would not appear in experiments.