If I have solid rod several light year long and I push one of the ends. How long will it take for the other end to be pushed?

Question

Will it take years for the “movement” to be felt from the other end?

In: 19

Answer 1

Speed of sound through the material x distance. Pushing the rod will compress it, the speed that compression wave will move through the rod is the the speed of sound.

Check https://www.engineeringtoolbox.com/amp/sound-speed-solids-d_713.html for the speed in various solids