Obviously theoretical but if I took a light year long stick and say pushed a button at the other end would that button be pushed at the same time for me as say someone standing at the button? How does the frame of reference work when physically moving something? And could that “work” as a method of instant communication?
In: Planetary Science
No, the speed of “push” is the speed of sound in that material. It would look more like a compression wave travelling up the material
Latest Answers