Question on Time Dilation for Traveling Observers

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Discussion Overview

The discussion revolves around the concept of time dilation as experienced by three observers: two traveling at relativistic speeds on separate ships and one stationary observer on a space station. Participants explore how each observer perceives the passage of time on the others' clocks, considering their relative motions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions what the observer on one ship would see when comparing their clock to the clocks on the space station and the other ship.
  • Another participant suggests that each observer would see the other clocks running slower than their own, based on their individual frames of reference.
  • A later reply introduces the Relativistic Doppler Factor to quantify the time dilation effects observed, providing a mathematical expression for the perceived rates of the clocks.
  • The same reply notes that the calculations assume the ships and the station are aligned and that the ships are moving away from the station.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specifics of the observations, as there are differing interpretations of how time dilation applies in this scenario. Multiple competing views remain regarding the exact perceptions of the clocks.

Contextual Notes

The discussion includes assumptions about the alignment of the ships and the station, as well as the conditions under which the time dilation effects are being analyzed. The mathematical expressions provided depend on these assumptions and may not cover all possible configurations.

Who May Find This Useful

This discussion may be of interest to those studying relativistic physics, particularly in understanding time dilation and the effects of relative motion on the perception of time.

dako7
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I just had a quick question on time dilation that I'm stumped on.

There are three observers: two are traveling on separate ships traveling close to the speed of light (their speeds are the same) in opposite directions parallel to each other. One observer is standing still on a space station in between both ships. There are three large clocks, one connected to one ship, one connected to the other, and one connected to the space station. The observer on one of the ships takes out some binoculars (assuming they are able to) and looks the two other clocks in comparison to his own. What will they see?

Well, this observer would notice that the clock on the space station is moving much slower than his own, but what would they see the other ship's clock doing? Because it is traveling at the same speed, albeit in the opposite direction, would the clock be running at the same speed? Or slower?
 
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dako7 said:
I just had a quick question on time dilation that I'm stumped on.

There are three observers: two are traveling on separate ships traveling close to the speed of light (their speeds are the same) in opposite directions parallel to each other. One observer is standing still on a space station in between both ships. There are three large clocks, one connected to one ship, one connected to the other, and one connected to the space station. The observer on one of the ships takes out some binoculars (assuming they are able to) and looks the two other clocks in comparison to his own. What will they see?

Well, this observer would notice that the clock on the space station is moving much slower than his own, but what would they see the other ship's clock doing? Because it is traveling at the same speed, albeit in the opposite direction, would the clock be running at the same speed? Or slower?

Each observer has his own frame of reference and would see the other clocks as running slower than his own.
 
Awesome, thank you so much. :)
 
Let's call the speed of each ship relative to the station β, a fraction of the speed of light. Then each ship will see the station's clock running slower according to the Relativistic Doppler Factor:

√[(1-β)/(1+β)]

And they will each see the other ship's clock running slower by the square of this factor or simply:

(1-β)/(1+β)

And the station will see each ship's clock running slower by the first factor.

EDIT: This is assuming that the ships and the station are in line with one another and that the ships are traveling away from the station.
 

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