Relativistic Effects in Relative Motion of Objects

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Discussion Overview

The discussion centers on the concept of relativistic effects in the context of relative motion between observers. Participants explore the implications of relativity, particularly regarding the nature of motion, the experience of different observers, and the potential for communication between them. The scope includes theoretical considerations and conceptual clarifications related to physics and relativity.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants assert that there is no absolute motion or rest, emphasizing that motion is always relative to an observer.
  • One participant suggests that observers will witness equal relativistic effects regardless of their chosen frame of reference, provided they are in inertial frames.
  • Another participant notes that this equivalence holds only in flat space-time and for inertial observers.
  • There is a discussion about whether different perspectives could imply the existence of different universes, with some arguing against this notion and suggesting that all observers experience the same universe from different viewpoints.
  • Questions arise regarding the possibility of simultaneous communication between observers with different perspectives, leading to further inquiries about the interpretation of 'simultaneous' communication.

Areas of Agreement / Disagreement

Participants generally agree on the relativity of motion and the experience of observers in inertial frames, but there is disagreement regarding the implications of these perspectives, particularly concerning the existence of different universes and the nature of simultaneous communication.

Contextual Notes

Some claims depend on specific conditions, such as the requirement for inertial frames and flat space-time. The discussion also highlights the ambiguity in terms like 'simultaneous communication,' which may have multiple interpretations.

ag048744
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There is no such thing as absolute motion or rest. This is because one can record the speed of an object moving relative to it and find that it is in motion. The same holds for the object in motion. An observer on the object will observe the other observer moving relative to him. The measured velocity of the observer will be equal to the measured velocity of the other. So, am I right in saying whichever observer I choose to be with, I will witness equal relativistic effects in the object undergoing relative motion?
 
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ag048744 said:
There is no such thing as absolute motion or rest. This is because one can record the speed of an object moving relative to it and find that it is in motion. The same holds for the object in motion. An observer on the object will observe the other observer moving relative to him. The measured velocity of the observer will be equal to the measured velocity of the other.
Yeah,the motion will be same in relativity equations.If you see an object moves a velocity v other observer will see -v.
ag048744 said:
So, am I right in saying whichever observer I choose to be with, I will witness equal relativistic effects in the object undergoing relative motion?
Can you be more spesific like giving an example ?
 
ag048744 said:
So, am I right in saying whichever observer I choose to be with, I will witness equal relativistic effects in the object undergoing relative motion?
Only in flat space-time if both are inertial.
 
ag048744 said:
There is no such thing as absolute motion or rest.
That is a positivist claim which cannot be validated. What we can say, is that according to current knowledge, no such thing as absolute motion or rest can be observed.
This is because one can record the speed of an object moving relative to it and find that it is in motion.
One could just as well conclude that it is the other object that is in motion. Thus we only find that the objects are in relative motion; for uniform motion we cannot determine which is moving, or if both are moving.
The same holds for the object in motion. An observer on the object will observe the other observer moving relative to him. The measured velocity of the observer will be equal to the measured velocity of the other. So, am I right in saying whichever observer I choose to be with, I will witness equal relativistic effects in the object undergoing relative motion?
Yes indeed, as long as you mean with "whichever observer", that you set up a standard inertial reference system.
 
Wow, very fascinating. Could this mean that this could give rise to different universes?
 
ag048744 said:
Wow, very fascinating. Could this mean that this could give rise to different universes?
Er, I think not. The replies you've had would suggest that every inertial observer experiences the same universe viewed from a different perspective ( Weyl refers to relativistic effects as 'velocity perspective').
 
Mentz114 said:
Er, I think not. The replies you've had would suggest that every inertial observer experiences the same universe viewed from a different perspective ( Weyl refers to relativistic effects as 'velocity perspective').
 
Hmm that is so strange. Is it possible for the observers with different perspectives to communicate to each other simultaneously?
 
ag048744 said:
Hmm that is so strange. Is it possible for the observers with different perspectives to communicate to each other simultaneously?
What do you mean by 'communicate simultaneously' ? It has a number of different interpretations.
 

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