Why do electromagnetic waves travel in space?
Light is a different critter in that it is electromagnetic energy, and, as such, it does not need a medium to travel through. It moves very well through the vacuum of space. But the idea that it won’t stay where it was created makes it similiar to the water wave. Wherever this little electromagnetic ray began, it didn’t stay there. Light is electromagnetic energy, and it has an innate desire to move. Movement is actually part of what light is. Light is a moving electric and magnetic field. Both. At the same time, and at right angles to each other. By definition light moves, and it will travel anywhere it can. That’s why light rays, little bundles of electromagnetic energy, move through space or any other medium that they can move through.
