Aki Posted December 28, 2003 Report Share Posted December 28, 2003 Is it true that time doesn't exist in the 4th dimension? A friend said that time in the 4th dimension constantly moves back and forth. So in other words, no species can live in that dimension, right? Link to comment Share on other sites More sharing options...
Roberto Posted December 29, 2003 Report Share Posted December 29, 2003 Sorry, Aki, but I don't know any theory where what you said happens. There's no basis to assert that a 4-th dimensional universe has no time, even because string theory is formulated in 10 dimensions and time existsin that theory. Link to comment Share on other sites More sharing options...
Primal Fears Posted January 4, 2004 Report Share Posted January 4, 2004 yo AKI science only hypothesizes that the 4th dimension is time so realy no one can give u an answer that would realy nail down if the 4th dimension is time or if its just a nice little space in are head lol If u disagree you can set me strait Link to comment Share on other sites More sharing options...
wavelength? Posted January 8, 2004 Report Share Posted January 8, 2004 If you apply the laws of particle physics to the fouth dimension which is time then the only way that time would not exist is if you were a wavelength traveling through a complete vacuum free from the obstuction of all other wavelengths. Link to comment Share on other sites More sharing options...
BIG-D Posted January 8, 2004 Report Share Posted January 8, 2004 you are an idiot Link to comment Share on other sites More sharing options...
Primal Fears Posted January 9, 2004 Report Share Posted January 9, 2004 lol BIG-D lol well thats one way to put it. Link to comment Share on other sites More sharing options...
wavelength? Posted January 9, 2004 Report Share Posted January 9, 2004 I'm sure people called Einstein an idiot too. Link to comment Share on other sites More sharing options...
Tormod Posted January 9, 2004 Report Share Posted January 9, 2004 This is getting out of line. Please read our FAQ. BIG-D, please check your private message box. Tormod Link to comment Share on other sites More sharing options...
FuzzyDice Posted January 13, 2005 Report Share Posted January 13, 2005 Does anyone know how i could demonstrate the fourth dimension in action? a 2-D or 3-D model hopefully. i was also thinking about showng spaces curves with a wire model. any help would be appreciated. Link to comment Share on other sites More sharing options...
Tormod Posted January 13, 2005 Report Share Posted January 13, 2005 I think the Feynman diagrams would be helpful. Link to comment Share on other sites More sharing options...
infamous Posted January 14, 2005 Report Share Posted January 14, 2005 Hey Tormod; Correct me if I'm wrong about this, but I was under the impression that we were already living in the 4th dimension. From this I mean that, there are 3 spacial dimensions and 1 of time which we are moving through at the present. Ofcourse string theory complicates this discussion considerably, taking into account the 11 or 20 dimensions, depending upon which model one ascribes to, that are currently popular in string theory circles. Link to comment Share on other sites More sharing options...
maddog Posted January 14, 2005 Report Share Posted January 14, 2005 Does anyone know how i could demonstrate the fourth dimension in action? a 2-D or 3-D model hopefully. i was also thinking about showng spaces curves with a wire model. any help would be appreciated. Fuzzy, I you captured all the data of the motion of a 3D beachball as it move. The virtual objectcreated is a 4D object. Simple enough. So when you throw an object in the air, the totalmovie of that object is a 4D (said differently). Tormod's mention of Feynman diagram is a simple way to think about it in the quantumrealm. Aki, There is no prohibition of adding time to a set number of spatial dimensions (be it 3 oranother number). There are limited number of dimensions in which Cross products canbe formulated which limit the number of choices for the number of dimensions. TheCross product or generalized "Outer Product" is used in computing magnetic field potentialas well as a few other areas. From a friend who was an Algebraic Geometer and Mathematician told me that he was only aware of two (3, 7) where the product space was1-1 and onto (back in the same domain you started). This would mean only 3 and 7 wouldallow you produce a field potential as in EM. :) Maddog Link to comment Share on other sites More sharing options...
pgrmdave Posted January 14, 2005 Report Share Posted January 14, 2005 What is the difference between a spatial dimension and a time dimension? IrishEyes 1 Link to comment Share on other sites More sharing options...
infamous Posted January 16, 2005 Report Share Posted January 16, 2005 What is the difference between a spatial dimension and a time dimension?Einstein wrote about what he called world lines, generally speaking world lines could be thought of as a string of interconnected points in the advancing time frame. This might be a little easier to understand if one views each point in time as a separate universe from the next and following one. Because we are advancing through these different points in time it is understood to be the 4th dimension. Link to comment Share on other sites More sharing options...
Turtle Posted January 18, 2005 Report Share Posted January 18, 2005 Time IS the fourth dimension. Link to comment Share on other sites More sharing options...
maddog Posted January 18, 2005 Report Share Posted January 18, 2005 What is the difference between a spatial dimension and a time dimension? A spatial dimension has an implied direction (we have 3 spatial that our eyes sees), whereastime is often refered to as a scalar dimension (this is because no direction implied). Thespatial dimension can be put together to form a Vector. A constant (speed of light - c) mustbe multiplied to convert the units. :hihi: Maddog Link to comment Share on other sites More sharing options...
pgrmdave Posted January 18, 2005 Report Share Posted January 18, 2005 But, assume that our universe was two dimensional - that we were all two dimensional beings, and that we only knew of two spatial dimensions. But we discovered that TIME was a dimension, and that we were travelling through it. So now we would know of three dimesions - two spatial and one time. Now, imagine that the universe was a flat plane, and that the third dimesion consisted of all of these universes piled on top of one another, in such a way that each dimesion was only affected by the dimensions before it. To the beings within the 2D universe, we would be "moving" through time, while in reality, that sense of "motion" comes only from the fact that events can only affect other events in one direction within the third dimension. In reality, all of "time" would exist at once, stationary. This is how I view the time dimension - continuous third dimensions with cause and effect happening only in one direction. IrishEyes 1 Link to comment Share on other sites More sharing options...
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