If light is not accelerated past the maximum speed proposed by Einstein then why do speeding cars seem blurred when they drive past you at a crossroads. If light is not affected by the speed of the cars then why does it seem distorted contrasted to when you are driving at the same speed as the car you are watching. Also what would happen if a spaceship travelling at near the speed of light turned its headlamps on? Why is light not afftected by motion? I would appreciate it if all answers were in laymans terms. Thanks.