Thomas2
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Yes but this is merely a constant offset (if any) depending on the proper length of the rods and the location of the clocks and the signal propagation speed (e.g. the speed of sound within each rod).Doc Al said:When two objects collide, everyone agrees that they collide "at the same time". (Otherwise, how could they collide?) But in your example, the clocks do not start or stop at the moment of the mechanical collision. Since the clocks are not collocated with the collisions, it takes time for the signals to reach them.
Likewise you couldn't agree about the frame in which the time dilation is supposed to occur, i.e. we have a ambiguous (paradoxical) situation.Where's the paradox? Not everything is a paradox.For example: Frame A says that rod B is contracted... But frame B says that rod A is contracted! Paradox? No... just standard relativity describing the relationship between observations made in two inertial frames.