dasa 发表于 2013-12-20 15:19* p' g, e" R! x' w8 G) I
算是吧。; c6 f3 |& [0 Q3 ]4 N; P, b: y
直觉上认为二者应该想质量与能量一样,通过常数C转换。
dasa 发表于 2013-12-24 23:07; ?) `+ v2 H5 A8 M9 |* r' {
这个我还真不是特别清楚。狭义相对论的确讨论过时空一体的问题。不过不记得有过这种定量关系的表述。 ...
dasa 发表于 2013-12-20 17:05, @9 e6 h5 s# c2 d0 v
不过空间的第四维和时间的维度不是一样的。事实上现有的宇宙时空结构就是三维空间加一维时间构成的四维时 ...
At the time, it was known that Maxwell's equations, when applied to moving bodies, led to asymmetries (Moving magnet and conductor problem), and that it had not been possible to discover any motion of the Earth relative to the 'light medium'. Einstein puts forward two postulates to explain these observations. First, he applies the principle of relativity, which states that the laws of physics remain the same for any non-accelerating frame of reference (called an inertial reference frame), to the laws of electrodynamics and optics as well as mechanics. In the second postulate, Einstein proposes that the speed of light has the same value in all inertial frames of reference, independent of the state of motion of the emitting body.
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