Time Dilation & Acceleration: Leaving Earth Effects

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Discussion Overview

The discussion revolves around the effects of constant acceleration on time dilation experienced by a spacecraft leaving Earth. Participants explore the implications of acceleration on time as perceived by observers on the ship versus those on Earth, considering both theoretical and conceptual aspects of relativity.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • Some participants propose that leaving Earth at constant acceleration will result in time on board the ship moving slower compared to time on Earth.
  • It is suggested that the duration of acceleration depends on how long the ship's engines are firing, leading to differing measurements of time between the ship and Earth.
  • Once the ship's engines are shut off, participants note that observers on both the ship and Earth will agree on the relative speed between them.
  • A participant shares a resource that discusses these issues in detail, indicating the complexities involved in understanding time dilation and acceleration.
  • Some participants express appreciation for the insights shared, indicating a level of complexity that was previously unknown to them.

Areas of Agreement / Disagreement

Participants generally agree on the effects of acceleration on time dilation but have differing views on the implications of time measurement between the ship and Earth. The discussion remains unresolved regarding the specifics of how time is perceived during and after acceleration.

Contextual Notes

The discussion highlights the dependence on definitions of time measurement and the complexities involved in relativistic effects, which may not be fully resolved within the conversation.

wondercosmos
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Leaving Earth at constant acceleration will make time on board go slower.
Acceleration will take the ship closer and closer to c
Question is:
How long will acceleration act on the ship?
The time as measured on Earth or on the ship?
The final v will be greatly different. Of course, given enough time, in both cases final v will be the same (or almost).
Regards, Mauro.
 
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The acceleration will act on the ship for as long as its engines are firing.
A clock on board the ship and a clock on Earth will disagree about how long that is.

Once the engines are shut off so the ship is coasting instead of accelerating, the ship observers and the Earth observers will find the same value for the relative speed between the ship and the earth.
 
Here is a great page describing all of these issues.

http://math.ucr.edu/home/baez/physics/Relativity/SR/rocket.html
 
Last edited by a moderator:
Nugatory, I think I understand your answer. Of course! Thank you.
DaleSpam, great article. It shows complexities I did not know. Thanks.
 

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