Does three Dimension realy exsist and why?

AI Thread Summary
The discussion centers on the nature of three-dimensional existence in the universe, questioning why all measurable objects appear in three dimensions. It suggests that the universe is fundamentally structured in three dimensions, making it impossible to have true four-dimensional or lower-dimensional objects within it. The relevance of thermodynamics and entropy is also mentioned, implying a connection between the universe's dimensionality and its thermal properties. Understanding cosmology is highlighted as essential for grasping these concepts. Overall, the conversation emphasizes the intrinsic three-dimensional nature of our universe and its implications for matter and energy.
SecretOfnumber
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Just wondering why everything measurable in the universe appears in 3 dimensions?(as far as I know!)
And why universe build up(objects) based on three dimensions ?is that anything to do with thermodynamic(Entropy)?

Cheers,
 
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You are almost close to understanding the starting phase of three dimensions you see we live in a dimension where every thing is three dimensional size's if we were able to access different dimensions we would have a better understanding of that now the part of thermodynamic entropy well it is relevant to the topic because the universe is made of waves of heat signatures called quanta you will know once you understand cosmology and so fourth.
 
SecretOfnumber said:
Just wondering why everything measurable in the universe appears in 3 dimensions?(as far as I know!)
And why universe build up(objects) based on three dimensions ?is that anything to do with thermodynamic(Entropy)?

Cheers,
Because our universe has three dimensions of space. You can't have a four-dimensional object in three-dimensional universe. And when the building blocks of matter are themselves three-dimensional, it's not possible to have an actual one or two-dimensional object either.
 
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https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
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