Normally when two people hold a long stick the receiving person would feel at the same time the stick moving when the first person gives the stick a push. But is that in reality exactly the case? Because the atoms of a stick are actionally pushing each other from the beginning toward the end of the stick and that takes time. But is that true or is immediate reaction still possible?
Perhaps material with a crystal structure can pass through the moving signal the fastests. So a stick of diamand could fe be moved very quickly. If so are the electric fields of the atoms just pushing each other or is there also photons involved which forbid to push the stick faster then light?
It is also said that the speed of sound is involved, but what is the difference in such a case? Isn't elektro-magnetic moving not always the fastest