What Are the True Nature and Meaning of Extra Dimensions?

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SUMMARY

The discussion clarifies the concept of extra dimensions, emphasizing that while the three basic dimensions are width, height, and depth, the fourth dimension is commonly understood as time. Additional dimensions, such as those proposed in string theory, are geometrical in nature and can be visualized through higher-dimensional figures. The conversation highlights the importance of understanding these dimensions within the framework of special relativity, which supports the notion of time as a dimension.

PREREQUISITES
  • Basic understanding of dimensions in physics
  • Familiarity with special relativity concepts
  • Knowledge of string theory fundamentals
  • Ability to interpret geometrical representations of higher dimensions
NEXT STEPS
  • Research the implications of time as the fourth dimension in special relativity
  • Explore string theory and its proposed extra dimensions
  • Study geometrical representations of higher-dimensional figures
  • Investigate the mathematical frameworks used to describe extra dimensions
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Students of physics, theoretical physicists, and anyone interested in understanding the complexities of dimensions beyond the conventional three.

MartianVision
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I'm a little confused by extra dimensions. People seem to say different things about the 'extra dimensions. Everyone seems to say that there are 3 basic dimensions (width, height, depth), however some people say different things about what additional dimensions are, just wondered if someone can clear it up.

Is a fourth dimension time, and the fifth, sixth seventh etc. the different dimensions related to string theory, or are the extra dimensions more geometrical, such as this image:
http://www.dimension1111.com/images/dimensions1.png

Or am I just getting completely muddled up?

Sorry if I didn't really explain it too well, I'm terrible at explaining myself lol, and sorry if it's in the wrong forum.
 
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The picture you've given shows projections of higher-dimensional figures. Yes, they are "geometrical" and look exactly like that. This is a stage in learning about higher dimensions, but don't get stuck with it. Keep learning.
 
We live in a 4D universe if you consider time as a dimension. According to special relativity there is no reason it can't be a dimension as well
 

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