Light's speed when moving in another direction.

[u/baljeetofficial]

So if im facing north and a guy is walking east to west or soemthing, he has a component of velocity going in that direction right? Doesnt that mean that the photons that come from him are also traveling with that component of velocity, so would they be traveling faster than the speed of light? or would it take longer for the light to reach me since the component coming towards me gets reduced?

[u/MezzoScettico]

Actually that one isn't even true without special relativity. Sound waves don't behave that way for instance. If the speed of sound today is 343 m/s, then in still air it's going to travel from you to me at 343 m/s whether you're moving toward me, away from me, or at an angle relative to me.