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-   -   Light Cones and Simultaneity (http://www.physicsforums.com/showthread.php?t=459715)

thenewmans Dec29-10 03:07 PM

Light Cones and Simultaneity
 
Please tell me if I have this correct. A particle has both a future light cone and a past light cone. In the past is everything that can affect the particle without exceeding Special Relativity. Now letís say you have 2 entangled particles and you measure them so that each measurement is taken outside of the other particleís light cones. Determining which measurement was taken first requires a specific inertial frame of reference. If thatís correct then you canít determine which measurement was taken first absolutely since you can always pick a specific inertial frame of reference which disagrees. (The events donít require entanglement. Iím just thinking about QM.)


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