put a strong magnet in each hand, same pole faces each other, keep hands at a fixed distance, feel the tension? yes.

now wave 1 hand, what do you feel on the other hand?

now put opposite pole faces each other, feel the attraction? yes.

now wave 1 hand, what do you feel on the other hand?

same result, the other hand senses the force and waves at same frequency. 

that is the mechanism of em wave, light, photon, quanta, radiant energy, solar energy, aether.

instead of magnetic force, gravity between masses and the repulsion force between electrons on the line of sight surface atoms are the carriers of gravity wave and light wave.

there is nothing waves other than charged particles and excited atoms, the force/energy move at light speed/electrostatic force speed/gravity speed.