Is Time Truly the Fourth Dimension or Something Else Entirely?

In summary, the conversation revolves around the concept of time as the fourth dimension. The speaker initially believed that time was the fourth dimension due to the way dimensions are built up, but has since changed their mind. They argue that in order for something to qualify as a dimension, one must be able to move backwards and forwards through it, which is not possible in time. Another participant questions the significance of defining something as a dimension in physics and whether it actually helps us understand the dynamics of a system. The conversation ends with no clear conclusion on what the fourth dimension may be.
  • #1
minase
42
0
I'm just curious to see what other people in this group have to say about this theory I have. I used to think that time was the fourth
dimension. It seemed pretty logical due to the way dimensions are built up. The zero dimension is a point, the first dimension is an
infinite number of points extended into the first dimension (or a line). The second dimension is an infinite number of lines extended
into the second dimension (or a plane). The third dimension is an infinite number of planes extended into the third dimension (or a cube or any other 3d object). Now if you extend a bunch of 3D spaces into a fourth direction I would have thought that you'd have a timeline (each 3D space would be a single moment on that timeline). Recently, however I have changed my mind. In order for something to qualify as a dimension it seems that you need to be able to move backwards and forwards through it. Now of course we can move forward in time but moving backward is not so obvious. But even if we did have a time machine and tried to move back in time, the time traveler would go back in time too! All the atoms in my body would move backward in time as a result of me moving backwards in the fourth dimension (assuming it's time) which means that moving backwards in time would be the same as age regression so the farthest you could go back would be the time you were born. Thus time can't be the fourth dimension. In the first three dimensions I can go backwards and forwards through them indefinitely (assuming an infinite universe), so if time is the fourth dimension why the limit all of a sudden? I think instead that the fourth dimension is something else. What that something else is though, who knows...possibly something's internal rate of vibration? I have not a clue. Any comments would be appreciated.
 
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  • #2
As far as I know, time is still considered the 4th. I've never seen a law stating that you have to be able to move at all in a dimension. The extra dimensions seem to be thought of as 'curled up' in tiny areas.
 
  • #3
minase said:
I'm just curious to see what other people in this group have to say about this theory I have. I used to think that time was the fourth
dimension. It seemed pretty logical due to the way dimensions are built up. The zero dimension is a point, the first dimension is an
infinite number of points extended into the first dimension (or a line). The second dimension is an infinite number of lines extended
into the second dimension (or a plane). The third dimension is an infinite number of planes extended into the third dimension (or a cube or any other 3d object). Now if you extend a bunch of 3D spaces into a fourth direction I would have thought that you'd have a timeline (each 3D space would be a single moment on that timeline). Recently, however I have changed my mind. In order for something to qualify as a dimension it seems that you need to be able to move backwards and forwards through it. Now of course we can move forward in time but moving backward is not so obvious. But even if we did have a time machine and tried to move back in time, the time traveler would go back in time too! All the atoms in my body would move backward in time as a result of me moving backwards in the fourth dimension (assuming it's time) which means that moving backwards in time would be the same as age regression so the farthest you could go back would be the time you were born. Thus time can't be the fourth dimension. In the first three dimensions I can go backwards and forwards through them indefinitely (assuming an infinite universe), so if time is the fourth dimension why the limit all of a sudden? I think instead that the fourth dimension is something else. What that something else is though, who knows...possibly something's internal rate of vibration? I have not a clue. Any comments would be appreciated.

Have you ever considered that maybe the criteria you are using to consider something as a "dimension" is meaningless in physics?

For example, what exactly is the outcome of such consideration? Does it help us define certain things better? Does it provide a profound insight into certain phenomena? More importantly, does it WORK when applied to the description of the dynamics of a system?

Without those considerations, all we have are just a jumble of words on how things are defined, without connection to anything important.

Zz.
 

1. What exactly is "Idea with physics Dimension"?

"Idea with physics Dimension" is a concept in physics that suggests there may be multiple dimensions beyond the three we can perceive (length, width, and height). This idea is based on theories such as string theory and the concept of a multiverse, and it is still being explored and debated by scientists.

2. How do scientists study and test the idea of physics Dimension?

There are several ways scientists study and test the idea of physics Dimension. One approach is through mathematical models and simulations, which can help visualize and understand how additional dimensions may function. Another way is through experiments using advanced technology, such as particle accelerators, to search for evidence of extra dimensions.

3. What are some potential implications of the "Idea with physics Dimension"?

If the idea of physics Dimension is proven to be true, it could have major implications for our understanding of the universe and how it functions. It could also potentially lead to new technologies and advancements in fields such as quantum computing and space travel.

4. Is there any evidence to support the idea of physics Dimension?

While there is currently no concrete evidence to prove the existence of additional dimensions, there have been some interesting findings in the field of physics that support the concept. For example, the behavior of subatomic particles and the unification of fundamental forces have led some scientists to believe in the possibility of extra dimensions.

5. What challenges do scientists face when studying the "Idea with physics Dimension"?

One of the main challenges scientists face when studying the idea of physics Dimension is the lack of experimental evidence. Since these dimensions are believed to be beyond our perceptible world, it is difficult to directly observe or measure them. Additionally, the complexity of these concepts and the mathematical models used to study them can also be a challenge.

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