Derivation of Relativistic Velocity Addition Using Algebra | Doc Physics

Hey now. If you come to this video thinking that the speed of light is infinity m/s and you don't like Einstein, this won't change your mind. But if you want to know how (mathematically) the universe guarantees that no one ever observes anything moving faster that the speed of light, yet everyone observes light moving at the same speed, watch this horrendous adventure. It's miserable calculation, featuring your old pals, time dilation and length contraction.