notice how the FIRST wave reaches the receiver at the same time, despite the black sender being in-motion.
this was just smthn to see if moving away from a star faster than they move towards you effects blue/redshifting. it does not. But this is a cool example of special relativity so i uploaded it anyways. edit- nope. it does, i wasnt looking at it the right way. the speed DOES effect it.
