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单词 simultaneity
释义
simultaneity

Physics
  • The condition in which two or more events occur at the same instant. In Newtonian physics any two events found to be simultaneous by one observer will also appear to be simultaneous to any other observer in uniform relative motion. In the theory of relativity, however, this is not true. See time.


Mathematics
  • Two events are simultaneous if they occur at the same time. A paradoxical consequence of relativity is that two observers cannot agree about the simultaneity of events. Indeed, the Lorentz-Fitgerald contraction is a consequence of an observer measuring between events which are not simultaneous in the rest frame of the object being measured.


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