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Aug 28, 2015 at 6:08 vote accept 1110101001
Aug 15, 2015 at 3:47 history edited 1110101001 CC BY-SA 3.0
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Aug 15, 2015 at 3:37 answer added 1110101001 timeline score: 2
Aug 15, 2015 at 3:25 comment added user10851 @1110101001 Feel free to answer your own question :)
Aug 15, 2015 at 3:07 comment added 1110101001 @Javier Ah I think I get it. When you install the device you will be working in the reference frame of the train so that it triggers when the devices are hit simultaneously from the reference frame of the moving train. However, what is simultaneous inside the train is not necessarily simultaneous to an outside observer. Hence to the outside observer the device will trigger when the events are not simultaneous, as governed by the lorentz transformations. So the device will indeed explode in both cases.
Aug 15, 2015 at 3:01 comment added Javier The explosion occurs when the devices are hit simultaneously from what frame of reference? That is the key question.
Aug 15, 2015 at 2:58 history asked 1110101001 CC BY-SA 3.0