Look transverse waves on a string propagate along the string due to the electromagnetic (EM) forces between adjacent particles of the string. So when one of the particles is displaced, it will drag nearby particles and thus the disturbance travels.In case of electromagnetic waves, the electric field values oscillate with time.But is there anything physical that connects the electric field at a point to that at its nearby points (just like we had for strings)?
If not, then why does this information travel? And if yes, then what is that “thing”?