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
Nope.
Ever seen or experienced an earthquake?
That is a piece of the earth shifting suddenly. It propagates outward as a sound wave.
Your long stick would be the same thing. A wave traveling through it at the speed of sound.
The speed of sound in the stick just to be clear. Not the speed of sound you are used to in the atmosphere.
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