# What is time in string/M-theory and Four-dimensionalism?

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• kodama
Objects in string theory do not have temporal parts in the traditional sense, as time is considered to be an emergent property of the interactions between strings. Therefore, the debate of Three vs Four-dimensionalism does not directly apply to string theory.
kodama
TL;DR Summary
concept of time
what is time according to string/M-theory

do objects in string theory also have temporal parts?

and how does the debate of Three vs Four-dimensionalism apply to string theory which posits 10/11 dimensions?

What we experience as three spatial dimensions plus time, is the four dimensional spacetime of GR.
kodama said:
what is time according to string/M-theory
do objects in string theory also have temporal parts?
In string theory, spacetime is ten-dimensional (nine spatial dimensions, and one time dimension). In M-theory, spacetime is eleven-dimensional (ten spatial dimensions, and one time dimension).

kodama said:
... and how does the debate of Three vs Four-dimensionalism apply to string theory which posits 10/11 dimensions?
The extra 6/7 dimensions are hypothesised for mathematical consistency, and are not observed in experiments.

## 1. What is string/M-theory?

String/M-theory is a theoretical framework that aims to unify all the fundamental forces and particles in the universe. It suggests that the fundamental building blocks of the universe are not particles, but tiny strings that vibrate at different frequencies, giving rise to different particles and forces.

## 2. How does string/M-theory explain time?

In string/M-theory, time is considered to be a dimension, just like the three dimensions of space. This theory suggests that time is not absolute, but rather relative and can be affected by factors such as gravity and velocity.

## 3. What is the difference between Four-dimensionalism and string/M-theory?

Four-dimensionalism is a philosophical concept that suggests that objects exist in all points in time, while string/M-theory is a scientific theory that aims to explain the fundamental nature of the universe. While they both deal with the concept of time, they approach it from different perspectives.

## 4. How does string/M-theory explain the concept of multiple universes?

String/M-theory suggests that there may be multiple universes, or a multiverse, in which each universe has its own set of physical laws. These universes may have branched off from each other during the early stages of the universe, and string/M-theory attempts to explain the existence of these universes through the concept of extra dimensions.

## 5. Is string/M-theory a proven theory?

String/M-theory is still a developing and highly debated theory in the scientific community. While it has not been proven yet, it has shown promise in providing a unified explanation for the fundamental forces and particles in the universe. Further research and experiments are needed to fully test and validate this theory.

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