Speed of light and higher dimensions

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SUMMARY

The discussion centers on the behavior of light as it interacts with higher dimensions, particularly in the context of string theory. Participants assert that light does not transition from higher dimensions to three-dimensional space; rather, it exists simultaneously in both realms. The speed of light remains constant in our universe, and there is no evidence to suggest it varies when considering additional compact dimensions. The conversation also touches on the implications of multiverse theories and how they might relate to the speed of light.

PREREQUISITES
  • Understanding of string theory and its implications on dimensions
  • Familiarity with the concept of compact dimensions in physics
  • Knowledge of the speed of light as a fundamental constant
  • Basic grasp of multiverse theories and their interpretations
NEXT STEPS
  • Research the implications of string theory on the speed of light
  • Explore the concept of compact dimensions in advanced physics
  • Investigate the relationship between light and gravity in multiverse scenarios
  • Learn about waveguide modes and their relevance to higher-dimensional physics
USEFUL FOR

Physicists, cosmologists, and students interested in theoretical physics, particularly those exploring the intersections of light behavior, string theory, and higher-dimensional spaces.

bellatrix gray
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will there be any effect on the speed of light ,when it travels from higher dimensions to three dimensions of space ?
 
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bellatrix gray said:
when it travels from higher dimensions to three dimensions of space ?
What do you mean by this?
 
Orodruin said:
What do you mean by this?
i meant, what is the speed of light at higher compressed string theory dimensions?
 
bellatrix gray said:
will there be any effect on the speed of light ,when it travels from higher dimensions to three dimensions of space ?
bellatrix gray said:
i meant, what is the speed of light at higher compressed string theory dimensions?
It never happens that light travels from higher dimensions to 3D space. In theories with additional compact dimensions, those compact dimensions exist at each point in the non-compact dimensions. So it never leaves the higher dimensions, it is always in both.
 
Last edited:
Dale said:
It never happens that light travels from higher dimensions to 3D space. In theories with additional compact dimensions, those compact dimensions exist at each point in the non-compact dimensions. So it never leaves the higher dimensions, it is always in both.
and will there be any change ,while it is traveling in higher dimensions?
 
bellatrix gray said:
and will there be any change ,while it is traveling in higher dimensions?
Again, it is always traveling in all dimensions.
 
does this mean the universe our universe exists within shares the speed of light?
 
ccgjg said:
does this mean the universe our universe exists within shares the speed of light?
The speed of light is what it is.
In the Universe we know, the speed light can be measured, it is constant.
There s no reason I know of why light must travel at that speed. but it does.
 
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ccgjg said:
does this mean the universe our universe exists within shares the speed of light?

Our universe is not known to exist within another universe, so your question isn't answerable.
 
  • #10
ccgjg said:
does this mean the universe our universe exists within shares the speed of light?
Like gravity?
 
  • #11
Drakkith said:
Our universe is not known to exist within another universe, so your question isn't answerable.
I think he/she means that just like the bread slice example of multiverse which explains why gravity is weak, maybe speed of light is also distributed in the multiverse.
 
  • #12
I think the OP is just wondering if light can have a velocity component in an extra dimension which would make the projection of the velocity in our usual number of dimensions look smaller.
 
  • #13
My (naive) understanding is that the extra dimensions are smaller than the typical wavelength of particles, so there is no room to "move" in those directions. I suppose it should be like moving in a waveguide. Are there different waveguide modes?
 

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