Space/time expansion and quantum world

In summary, the red shift's measurement shows that galaxies are moving away from us as predicted. However, this expansion is only seen on a large scale and has no effect on anything at a quantum level. It is mainly observed in the intergalactic space.
  • #1
nouveau_riche
253
0
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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  • #2
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
 
  • #3
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.
 
  • #4
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?
 

Related to Space/time expansion and quantum world

1. What is space/time expansion?

Space/time expansion refers to the idea that the universe is constantly expanding and that time is also a part of this expansion. This means that objects in the universe are moving farther apart from each other and that time is passing at a faster rate as the universe grows.

2. How does space/time expansion relate to the Big Bang theory?

The Big Bang theory suggests that the universe began as a singularity and has been expanding ever since. This expansion includes both space and time, and is the basis for our understanding of the origins and evolution of the universe.

3. What is the quantum world?

The quantum world is a term used to describe the realm of physics that deals with particles at the smallest scales, such as atoms and subatomic particles. This field of study is governed by the laws of quantum mechanics, which explain the behavior of these particles and their interactions with each other.

4. How does quantum mechanics impact our understanding of space/time expansion?

Quantum mechanics plays a key role in our understanding of space/time expansion. It helps explain how particles behave and interact in the expanding universe, and how this expansion affects the passage of time. Quantum mechanics also provides insights into the early moments of the universe's expansion, such as during the inflationary period after the Big Bang.

5. Is there a connection between space/time expansion and the concept of parallel universes?

Some theories suggest that the expansion of the universe could lead to the creation of multiple universes, known as parallel universes. This is because the rapid expansion of space could cause regions of the universe to become disconnected from each other, creating separate universes with their own set of physical laws. However, this is still a topic of debate and further research is needed to fully understand the potential connection between space/time expansion and parallel universes.

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