I'm reading SpaceTime Physics by John Wheeler (not for school) and came across a problem that doesn't have answer in the back so i want to see if i understood it properly. the problem goes like this: You have two parallel wires with a battery and lighbulb connecting one end. on top of the two wires there are two metal bars perpendicular to the wires which are conneceted by nonconducting material. these bars complete the circuit so the lightbulb is on. Somewere along the wires there is a gap in the top wire which has the length of 2 in the wire's frame. the two bars are moving with a constant velocity relative to the wires so that in the wires frame the distance between them is 1. because of this, when the bars get to the gap the light will turn off when both bars are in the gap and then turn back on. But in the bars frame the gap has the length of 1 and the distance between the bars is 2 so in this frame the light will not go off since the gap is smaller than the distance between the bars. how can they both be right? Well, i think that the answer is that in the bar frame the light does turn off and on but these two events happen at the same time. in the wire frame they happen at the same place at different timesand in the the bars frame the happen at different places at the same time. Is this the right solution? Thanks.