if a ship is going at half the speed of of light (just imagine okay) and there is a light in the center of the ship then how fast would the light appear to go to somebody at the back of the ship? first it would look like it was going at the speed of light to an outsider so to the person in the ship it would look like it was going at 1.5c. then time would dialate (to one half speed?) and the speed would increase even more (to 3c). however light appears to go at the same speed for all observers so how does this work?