Understand 5th Dimension: Get Help Understanding 4th Dimension

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Discussion Overview

The discussion revolves around understanding the concept of the fourth dimension and its implications for comprehending higher dimensions, particularly the fifth dimension and beyond. Participants explore the theoretical and mathematical aspects of dimensions, including their relevance in physics and mathematics.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant expresses confusion about the relationship between understanding the fourth dimension and higher dimensions, seeking clarification.
  • Another participant questions the initial inquiry, indicating a lack of understanding of the question posed.
  • A participant clarifies that in physics, the fourth dimension is often considered time, while a spatial fourth dimension is not established in mainstream physics.
  • Some participants note that while mathematical models can include any number of dimensions, their practical value is limited if they do not correspond to observable reality.
  • String theory is mentioned as a framework that posits additional dimensions, but it is highlighted that these dimensions remain unverified and speculative at this time.
  • There is a discussion on the necessity of dimensions in defining locations in space, with a participant arguing that only three spatial dimensions are needed, and extra dimensions lack physical motivation.

Areas of Agreement / Disagreement

Participants express differing views on the existence and necessity of higher dimensions, with some arguing against their physical reality while others acknowledge their mathematical utility. The discussion remains unresolved regarding the implications of higher dimensions in relation to observable phenomena.

Contextual Notes

There are limitations in the discussion regarding the definitions of dimensions and the assumptions underlying the existence of higher dimensions, as well as the lack of empirical evidence for theories like string theory.

Bollini Mouli
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Hey guys,

I'm a newbie here. Is it true that one could understand fifth and above dimensions only if we get hold of fourth dimension and I've seen videos and read about fourth dimension but couldn't get it completely and exactly. So, I want your help here. Be mellow as much as you can.

Thank you.
 
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I want to help you but I didnt understand your question.
 
Bollini Mouli said:
Hey guys,

I'm a newbie here. Is it true that one could understand fifth and above dimensions only if we get hold of fourth dimension and I've seen videos and read about fourth dimension but couldn't get it completely and exactly. So, I want your help here. Be mellow as much as you can.

Thank you.
The "fourth" dimension in physics is time, so I'm assuming you mean a 4th dimension of space, which as far as we know does not actually exist. String theory postulates up to 11 dimensions, but there are no tests to see if these actually exist so string theory remains a form of math with no known correspondence to reality.

In math, "dimension" is just a degree of freedom and you can have as many as you like and there's nothing difficult about understanding them, they are just numbers.
 
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We only experience 3 space dimensions, and we don't have any kind of apparatus which hints at additional dimensions beyond what we can experience directly.
As Phinds, says it is possible to construct mathematical models with any number of dimensions, but if they don't correspond to any observable reality these models are not of much practical value.
String theories may possibly be verified in the future, and if they are we will have taken our understanding of nature into a whole new realm involving simultaneously something like 6 additional dimensions all at a sub microscopic scale, but for now though string theories are not verifiable, and are simply 'what if..?' based on nothing but math.
There is no definitive 'fourth' or higher dimension of space in any of today's mainstream physics.
What kind of sources have you been looking at which suggests there is?
 
One of the basic rules of science, like engineering, is add no unnecessary parts. You only need 3 spatial dimensions and an origin to uniquely define a location in space. Time is added as a fourth 'dimension' in GR as a mathematical convenience for bodies in motion. So there is no physical motivation for extra spatial dimensions. Extra dimensions do pop out of the math in things like string theory, but, this does not confer them any objective reality.
 
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