I have no idea if Im picturing this whole scenario wrong, so please hear me out and try to point me in the right direction. Anyways, say we have a fast moving rocket with a person in it. Lightning strikes a side of it. So the light travelling from the bolt to the person/observer is travelling perpendicular to the direction that the rocket is moving in. (In the picture, light travels from A to B. So when the rocket is moving, it ends up travelling from A to B' to an outside observer.) http://img6.imageshack.us/img6/4254/abrod.png [Broken] As for the outside observer, the light travels a longer distance (from A to B') with the speed c, so it takes longer time. In the rocket, however, it travels a shorter distance with the speed c, and therefore takes less time to reach its destination than for the outside observer. So it seems to the outside observer that things have slowed down in the rocket. Makes sense to me so far. It also makes sense to me when the lightning hits the rear end of the rocket. Then light has to travel a longer distance (as the outside observer sees it, because the rocket is moving in the same direction as light from the bolt) and therefore takes more to reach its destination and it still seems as if time has slowed down in the rocket. But where I get confused is here: when light hits the front end of the rocket (rocket is moving toward that direction), the outside observer sees that light from the bolt has to travel a shorter distance to the inside observer. And because the speed of light is the same for both observers, that would mean that it takes less time for the outside observer to see the light reach its destination. But that would mean that time has sped up in the rocket. This really confuses me because that way it seems like at the back of the rocket time has slowed down, but in the front it has sped up. But obviously its supposed to be slowed down all the way. Where do I go wrong? Thanks in advance, and I hope my text wasnt too confusing all the way and you understood what I was talking about.