Virtual distance and "relativistic length contraction"      Based on the same events, the observers aboard B determine that the .8 ls mark on A moved from the 1 ls mark on B where the clock was reading −.6 s to the origin of B where the clock was reading 1.0666 s. Therefore, the observers on B see the .8 ls mark on A move 1 ls through frame B in 1.6666 s and conclude that the velocity of frame A relative to B is (1 ls / 1.6666 s) or .6 c. This is the correct relative velocity because the observed distance and observed time are both 25% greater than the absolute distance and time.
 Based on the same events again, the observers aboard B also see the origin clock on B advance 1.0666 s while it moved from the origin of A to the .8 ls location on A. The observers conclude that the clock moved (1.0666 s · .6 c) or .64 ls along frame A, not .8 ls as shown by the distance scale on A. Therefore, the observers on B conclude that frame A is only (.64 ls / .8 ls) or .8 times the width of frame B. This virtual foreshortening of frame A is the "relativistic length contraction" that is predicted by relativity theory and attributed to the relative motion between frames. The fact that this and a wide variety of other strange phenomena are natural consequences of the quantum medium is strong evidence of the medium's existence.      The events used in our explanations of time dilation and length contraction were selected for convenience, but an unlimited number of other events could be used to reach the same conclusions. You can verify this by using the physical change ratio equation, the Asynchronization Rule, and a calculator to determine other combinations of events that all the observers can see and use to determine what is occurring during the experiment.

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