Question

光速运动时时间变慢的原因

Answer 1

更新1:

呀manki兄 咁我想问当我们运动时所减慢既时间流速是指咩既时间 正常流动紧既时间定系身体感觉既时间流动既? 如果我以光速运动 咁系咪走一步要超耐先走到? 定系其实我好快就走左果一步.但系我要超耐先感觉到自己系走左果一步 另外一无聊问题 咁如果我多运动系咪会比其他人年轻d- -

更新2:

呀天同兄可否用中文- -

因为当我们在 3+1 (x
y
z
time)维移动时
我们像是在一个空间(y-axis) vs 时间 (x-axis) 的图表中移动。 假设我们在3+1维以一个单位"前进"
当你在空间(y-axis)完全静止时
那一单位便完全地向时间(x-axis) 前进
那代 表我们的时间流速没有减慢。 当你在空间(y-axis)移动[不是光速]时
那一单位便不会完全地向时间(x-axis) 前进
那单位也在空间轴移动
所以相对地那单位在时间轴的长度缩短了
那代表我们的时间流速被减慢了。 当你在空间(y-axis)完全移动时[光速]
那一单位便完全地向空间(y-axis) 前进
那单位完全地在空间轴移动
所以相对地那单位在时间轴完全没有长度
等于时间完全 停止。 当你移动得被光速更快时
那单位还会指向时间轴的负值
也就是为甚么人们常说 被光速更快会时间倒流。 (像穿越戏一样) 其实没有那副图很难明白
看了这段片( *** /watch?v=G-R8LGy-OVs)会较容易明白。 开头是光速不变原理
然后便是了!!! 加上有条公式: 劳仑兹因子(那个符号不知点打)=1/ square root [1-(v^2/c^2)] 劳仑兹因子是代表时间的膨胀程度。 假设v=0
[劳仑兹因子=1]时间没有膨胀 (时间会流动)
但当v=c时
[劳仑兹因子=∞]便代表时间完全膨胀(时间不流动)。
参考: 忧
The main reason is the assumption that the speed of light is the same irrespective to the motion of the observer. This is one of the basic assumptions used by Einstein in formulating the Special Theory of Relativity (特殊相对论). Just as a simple illustration. Suppose an observer on earth watch the motion of a light photon
which travels a distance L in one second. Using the relation: speed = distance/time
we have c = L/1 (where c is the speed of light as observed by the observer on earth)
i.e. c = L -------- (1) Now
another observer in a spaceship travels at
say
a speed of half the speed of light. Suppose the spaceship starts together with the light photon
then after 1 second (time as measured on earth)
the photon travels a distance of L
whereas the spaceship travels a distance of L/2. That is
the observer in the spaceship sees the photon at a disatnce of L/2 ahead ot him. Hence
using equation (1)
time t = distance/speed = (L/2)/c = (L/2)/(L) = 1/2 Thus
the same event that takes 1 s to the observer on earth bees to last 1/2 second to the onserver in the spaceship. The time in the spaceship thus appears to run slower. Be aware that this is only a qualitative illustration. Do not regard it as a formal proof of the theory.