What is the 4th Dimension - 3D World + Time or 4 Axis?

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SUMMARY

The discussion clarifies the concept of the fourth dimension, distinguishing between its interpretation in physics and mathematics. In physics, the fourth dimension is understood as time added to the three spatial dimensions, while in mathematics, it refers to an additional spatial dimension independent of time. Participants emphasize that 4D objects exist in four spatial dimensions and one time dimension, asserting that the fourth spatial dimension does not correlate with time. This distinction is crucial for understanding the applications of 4D in different fields.

PREREQUISITES
  • Understanding of basic physics concepts, particularly dimensions.
  • Familiarity with mathematical definitions of dimensions.
  • Knowledge of spatial geometry and its implications.
  • Awareness of the differences between physical and mathematical interpretations of dimensions.
NEXT STEPS
  • Research the implications of 4D geometry in theoretical physics.
  • Explore mathematical models that utilize n-dimensional spaces.
  • Learn about the visualization techniques for higher-dimensional objects.
  • Investigate the applications of 4D concepts in computer graphics and simulations.
USEFUL FOR

This discussion is beneficial for physicists, mathematicians, computer scientists, and anyone interested in the theoretical implications of higher dimensions in both physical and mathematical contexts.

nirky
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Some people say that it's the 3D world we live in + time but others say that it's 4 dimensional as in it as new axis. Which one is true?
 
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russ_watters said:
Time.
So if we talk about 4D solids,does that mean they are related to time...?
 
No, when we talk about 4D objects, we mean that they exist in 4 spatial dimensions and one time dimension. The 4th spatial dimension has no relation to the time dimension.
 
Drakkith said:
No, when we talk about 4D objects, we mean that they exist in 4 spatial dimensions and one time dimension. The 4th spatial dimension has no relation to the time dimension.
Thanks Darkkith I understand now.
 
The main point is whether you are looking at physics (3 space + time) or math (n space, where n is any integer).
 

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