Planck size and Heisenberg and relativity

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Discussion Overview

The discussion centers on the nature of Planck units (time, length, mass) and the Heisenberg Uncertainty Principle in relation to relativity. Participants explore whether these concepts are absolute or observer-dependent, considering implications for both theoretical and conceptual frameworks in physics.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants assert that Planck units are absolute and independent of observers or reference frames.
  • Others argue that the Heisenberg Uncertainty Principle is observer-dependent, as measurements of certain variables can vary between observers.
  • One participant suggests that while Planck units are constant, the Uncertainty Principle reflects quantum properties that may require modification if they conflict with relativity.
  • Another viewpoint questions the validity of Planck units, suggesting they may be influenced by arbitrary choices of constants and could be subject to change over time.

Areas of Agreement / Disagreement

Participants express differing views on the nature of Planck units and the Heisenberg Uncertainty Principle, with no consensus reached regarding their dependence on observers or reference frames.

Contextual Notes

Some claims rely on specific interpretations of constants and their roles in physics, and there are unresolved questions about the implications of relativity on quantum mechanics.

heusdens
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Is the Planck time/length/mass affected by relativity, or are they constant (independent of relative velocity and/or gravitation field)?

Same question for the Heisenberg Uncertainty Relation. Is it observer dependent?
 
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The Planck units are absolute in their definition. They have nothing to do with observers or reference frames.

Heisenberg principle is implicitly in the frame of the observer.
 
Planck units are constant, that's why the can be used as Natural Units. The Uncertainty Principle describes the uncertainty of certain variables. These variables are measured differently from different observers, so it is dependent.
 
Planck units are a curosity - but they smack of cosmological numerology. Other thought to be constants such as the electron charge can be combined with G and c to lead to different magnitudes for the so called fundamental units. Moreover, if any of the constants picked for the game turn out to be long term variables, the whole notion is lost.
 
Heisenberg's uncertainty in variables (position and momentum and energy and time) shouldn't depend on observer is just a Quantum property in the same sense that Planck Constant or Planck's lenght/time, if relativity predicts the cntrary it should be modified (at least to match quantum scales).
 

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