Can the learned forum please help settle a discussion.
At approx 300,000 km per second it would take a second to transfer a morse code message 300,000 km by radio or light on a vacuum. I.e. if I flashed a light, some one 300,000 km away would see it 1 second later. A whole message would arrive 1 second after it was sent.
If the light were replaced by a solid metal pole which could be moved from position 1 or 2 to indicate a dot or dash like a piston. The movement need only be a fraction of a mm.
Being a physical connection, would the movement be noticed immediately at the other end or would it take a second for the movement to transfer along the end of the pole?
Someone asked me this question and it’s been bugging me.
Btw, I think the movement of one solid object is instantaneous I.e if you move your end 1 mm the other end is moved 1mm at the same time?
Thanks
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