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

Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
5 replies · 2K views
nirky
Messages
12
Reaction score
0
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?
 
Physics news on Phys.org
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.