What's the Delay with a Wire to a Planet 1 Light Year Away?

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Discussion Overview

The discussion revolves around the time delay involved in transmitting information to a planet located 1 light year away, specifically comparing wireless communication to a hypothetical wired connection. The scope includes conceptual reasoning about signal transmission speeds and the implications of physical laws on communication delays.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant states that a wireless phone call to a planet 1 light year away would have a time delay of 1 year, as the signal would take that long to travel.
  • Another participant asserts that transmission along a wire would be slower than the speed of light, referencing wave propagation speed.
  • A third participant emphasizes that information cannot travel faster than the speed of light, reinforcing the limitations of communication speed.
  • One participant humorously claims that energy is transmitted through the wire at the "speed of greased lightning," which is noted as not being a scientific response.

Areas of Agreement / Disagreement

Participants generally agree that there is a time delay associated with communication over long distances, but there is contention regarding the specifics of how a wired connection would compare to wireless communication. The discussion remains unresolved regarding the exact nature of the delay in a wired scenario.

Contextual Notes

There are limitations in the assumptions made about the speed of signal transmission in wires versus wireless communication, and the discussion does not clarify the definitions of "speed" or the conditions under which these speeds apply.

IssacBinary
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If we where to make a wireless phone call to a planet 1 light year away the lag/time delay would be 1 year.

They would have to wait 1 year to hear what we say today.

But if we used a long (long is an understatement) piece of wire connecting the 2 phones, what kind of delay would there be if any and why?
 
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Transmission along a wire would be slower. See: http://en.wikipedia.org/wiki/Wave_propagation_speed"
 
Last edited by a moderator:
Information can never travel faster than the speed of light.
 
Doc Al said:
Transmission along a wire would be slower. See: http://en.wikipedia.org/wiki/Wave_propagation_speed"

I think energy is transmitted through the wire at the speed of greased lightning.
 
Last edited by a moderator:
Fun Value said:
I think energy is transmitted through the wire at the speed of greased lightning.

not exactly a scientific response ;)

D
 

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