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

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The discussion centers on the interpretation of the fourth dimension, with some arguing it is the 3D world plus time, while others assert it represents an additional spatial axis. It clarifies that 4D objects exist in four spatial dimensions alongside one time dimension, emphasizing that the fourth spatial dimension is distinct from time. The conversation highlights the difference between physics, which considers 3 spatial dimensions plus time, and mathematics, which can define dimensions as any integer. Ultimately, understanding the fourth dimension depends on the context—whether it is viewed through a physical or mathematical lens. This distinction is crucial for grasping the concept of higher dimensions.
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).
 
Thread 'Is there a white hole inside every black hole?'

Thread 'Is there a white hole inside every black hole?'

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