Space/time expansion and quantum world

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Discussion Overview

The discussion centers on the concept of space/time expansion as observed through redshift measurements of galaxies and its implications at the quantum scale. Participants explore whether this cosmological expansion has any observable effects on smaller scales, such as atomic or quantum levels.

Discussion Character

  • Exploratory, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant notes that galaxies appear to be moving away from us, as indicated by redshift measurements.
  • Another participant questions whether cosmological expansion affects hydrogen atoms, suggesting that there is no detectable effect at the scale of the solar system.
  • A different participant asserts that the expansion of space has no impact on quantum scales and emphasizes that only large structures like galaxies are influenced by this phenomenon.
  • One participant reiterates the lack of detectable effects of expansion on smaller scales and seeks clarification on whether the discussion pertains to intergalactic expansion.

Areas of Agreement / Disagreement

Participants generally agree that cosmological expansion does not affect quantum scales or structures like atoms, but there is some ambiguity regarding the implications of this expansion on intergalactic scales.

Contextual Notes

The discussion does not resolve the implications of cosmological expansion on smaller scales, and assumptions regarding the effects of gravity on structures are not fully explored.

nouveau_riche
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as predicted by red shift's measurement the galaxies seems to be going away from us

how is this expansion be seen in quantum scale?
 
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Nouveau_riche, please do not use text-speak on PF. Please use standard capitalization and punctuation.

Your physics question is very vague. Are you asking whether, for example, hydrogen atoms get bigger due to cosmological expansion? If so, then the answer is no. There is not even any detectable effect at the scale of the solar system: http://www.astro.ucla.edu/~wright/cosmology_faq.html#SS
 
It has no effect on anything on a quantum scale. Only things on a very large scale, in fact only galaxies are being affected by this expansion. The gravity holding galaxies/solar systems together is strong enough to keep them whole.
 
bcrowell said:
Nouveau_riche, please do not use text-speak on PF. Please use standard capitalization and punctuation.

Your physics question is very vague. Are you asking whether, for example, hydrogen atoms get bigger due to cosmological expansion? If so, then the answer is no. There is not even any detectable effect at the scale of the solar system: http://www.astro.ucla.edu/~wright/cosmology_faq.html#SS

so what we have is intergalactic expansion?
 

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