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simultaneity    
n. 同时发生,同时

同时发生,同时

simultaneity
同时性

simultaneity
n 1: happening or existing or done at the same time [synonym:
{simultaneity}, {simultaneousness}]

Simultaneity \Si`mul*ta*ne"i*ty\, n.
The quality or state of being simultaneous; simultaneousness.
[1913 Webster]


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  • Real life examples of simultaneity - Physics Forums
    In your field there is no problem with simultaneity Your friend can find out how far away he is from you, he knows the speed of light, and he can correct for all this So simultaneity is easy and makes sense Now somebody moving at half the speed of light is watching you two guys He sees you do your corrections to get simultaneity
  • Relativity of Simultaneity Questions - Physics Forums
    All three, time dilation, length contraction, and relativity of simultaneity are important The Lorentz transform encapsulates all three In working out the numbers, you should use the Lorentz transform And 0 6 c is a good speed to use since relativistic effects are readily visualized and computed but things are still easy to draw
  • Help understanding the Relativity of Simultaneity - Physics Forums
    I recommend focusing on Morin's book The Relativity of Simultaneity (or Loss of Simultaneity) is the first thing he covers (1 3 1) Time dilation is the second (1 3 2) Spacetime diagrams come later (after chapter 1) Perhaps spacetime diagrams would help at this stage - Morin obviously decided otherwise, so why not trust him?
  • Relativity Simultaneity Convention: Meaning Impact - Physics Forums
    The (conventional) stipulation, how and under which conditions simultaneity (or dis-simultaneity) should be determined at least in principle, is (for instance) essential in definition and evaluation (incl determination of systematic uncertainties) of "speed"; namely explicitly concerning the "denominator term" in the symbolic mnemonic expression
  • Understanding Relativity of Simultaneity in Resnick, Part II
    Initially frustrated with the writing I switched to Susskind Yesterday, I decided to just check out the relativity of simultaneity part of Resnick to see if that chapter was better than the initial chapters But yes, watching a general relativity course last night I realized that in a more rigorous course everything is defined as in a math book
  • Einsteins train and simultaneity - Physics Forums
    I gave Einstein's operational definition of simultaneity, which is the one he used when he presented his train thought experiment I agree that this is not the most general definition, but it seems like the most relevant one for this particular discussion (since the OP doesn't appear to be considering non-inertial coordinates or curved spacetimes)
  • Is Simultaneity Absolute or Relative in the Theory of Relativity?
    There is a difference between the simultaneity of two events and the simultaneity of the light of those two events arriving at an observer The former is not frame dependent thus cannot be transformed away by motion The latter can and is transformed away by motion which is the basis for the relativity of simultaneity
  • Relativity of Simultaneity: A question about the train paradox
    Hi, I was reading the book "Spacetime Physics" by Taylor Wheeler In their discourse on the relativity of simultaneity, the example they have used is Einstein's Train Paradox See and also the attachment for the Train Paradox My question is this: The analysis of what the train observer(TO)
  • Simultaneity and the Twin Paradox - Physics Forums
    The simultaneity convention used above is what I call the naïve simultaneity convention, and it simply uses the momentarily co-moving inertial frame's definition of simultaneity In the "gap" and in the "overlap" regions the speed of light is no longer c, in fact all speeds of all objects in those regions are undefined
  • Simultaneity Non-Invariant Variables: Is the Speed of Light Necessary?
    When we talk about simultaneity what we talk about is the simultaneity of two events, which are points in spacetime Two events that are simultaneous in a given reference frame ##S## by definition have the same time coordinate ##t## and different space coordinates ##x_1## and ##x_2##, respectively





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