Dimension in Physics: Existing vs Non-Existing Points/Events

In summary, the conversation discusses the concept of dimensions and their relationship to existence. One statement defines a dimension as including both existing and non-existing points or events, while the other statement limits it to only existing points or events. The conversation also delves into the size of a point and the nature of the elements that make up our 4-dimensional universe. Ultimately, the question of what is the basic stuff of reality is left open for interpretation.
  • #1
Whitefire
39
0
I know this has been mulled over time and time again in different threads, so I will keep it short.

Which statement is more consistant with reality:

1. A dimension = all existing and non-existing points along an axis.
2. A dimension = all existing, but only existing points along an axis.

(change 'points' into 'events', 'interactions' or whatever else you prefer)

Thank you.
 
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  • #2
What you mean by existence?
 
  • #3
Usually a dimension is assumed to be infinite (number 1) but it is typically a range of values for a unique characteristic of which limits of existence can be constraints in that range.
 
  • #4
Whitefire said:
I know this has been mulled over time and time again in different threads, so I will keep it short.

Which statement is more consistant with reality:

1. A dimension = all existing and non-existing points along an axis.
2. A dimension = all existing, but only existing points along an axis.

(change 'points' into 'events', 'interactions' or whatever else you prefer)

Thank you.

How large is a point? Please specify in e.g. meters1, meters2 or meters3, whatever you prefer.

My question is a trick question.
 
  • #5
Okay, let's go with the flow.

What are the 'points' of the 4-dimensional universe around us? Are they the independant, fundamental elements? Like, maybe, photons, electrons, quarks?
Or is the 4-dimensional universe made up of collisions, interactions, relations between these elements?

Which is the basic stuff of reality?
(or to be fair: maybe both or neither, or you have some other answer)
 
  • #6
We stick to standard definitions here.
 

1. What is the concept of dimension in physics?

The concept of dimension in physics refers to the measurable quantity that describes the size, shape, or extent of an object or space. It is often represented by numerical values and can be used to describe the position, movement, and interactions of objects in the physical world.

2. How many dimensions are there in the physical universe?

According to our current understanding of physics, there are four dimensions in the physical universe: length, width, height, and time. These dimensions are often referred to as space-time and are used to describe the fundamental aspects of our physical reality.

3. What is the difference between existing and non-existing points/events in terms of dimensionality?

In terms of dimensionality, existing points/events refer to those that can be observed and measured in the physical world. These points/events have a specific location and are part of the four dimensions of space-time. Non-existing points/events, on the other hand, refer to theoretical or hypothetical entities that do not have a physical presence and cannot be directly observed or measured.

4. Can there be dimensions beyond the four that we know of?

Many theories in physics, such as string theory and M-theory, propose the existence of additional dimensions beyond the four that we currently understand. These extra dimensions are thought to be compactified or hidden from our perception, and their existence may help to explain certain phenomena that cannot be fully explained by our current understanding of the universe.

5. How does the concept of dimensionality impact our understanding of the universe?

The concept of dimensionality plays a crucial role in our understanding of the universe. It helps us to describe and measure the physical world and provides a framework for understanding the fundamental laws and principles that govern our reality. Additionally, exploring the possibility of additional dimensions beyond the four we know of can lead to new insights and advancements in our understanding of the universe.

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