It's my understanding that light travels at the same speed in all inertial frames of reference. Suppose there's a small train car 5 feet long (at our rest point of view) traveling at a constant speed near light speed somewhere between events A and B, and there's an observer in the front of the train and another observer in the back. Event A is well behind the train and event B is well in front. Would time for the front half of the train have to tick slower for the light from B to reach the train at its normal vacuum speed, while time for the back of the train would have to tick faster for the light from A to reach the rear observer? Every time dilation formula I ever see always compares objects moving side by side, instead of one of the objects being in front of the other. Would the train also shrink more in the front than the back due to contraction effects? Or what if there was just a person traveling without a train? Would the back of the person age faster than the front of him? Am I missing something here?