xelasnave
22-05-2008, 08:39 AM
Over the years I have tried to understand the space time concept... the term has folk thinking of the Universe as a very strange place providing the environment for black holes and distorted time...
I am now at the point where space time only means to me an inovative geometry that nevertheless overlays up[on space a grid..such to be able to relate points of mass and their relationships within the grid.
When the space time concept is presented we are told that we can visualise the situation as if space were a blanket and that it would distort when mass is placed upon it..in such an example we "see" space is wrapped around the blanket..pushed out of the way by the blanket.
I feel this can not be right... and that if one were to use a blanket and a ball to describe space and mass relationship one ends up with a view that is opposite to what the math/and or the general premise suggests...
I have stated this a few times but no one comes forward and says alex you are the one that is bent not space...
I say that if the blanket is used to describe space it could be best visualised using the props of blanket and ball if one were to place the ball under the blanket so as to show space distorted in a bulge toward the blanket not around it...
Please can anyone understand what I am talking about and / or see the point that the example is misleading???
Or imagine a 2d grid representing one plane... some graph paper.... now if we put a point in there on the graph /grid paper that represents a point of mass how does the grid "bend" ..two choices..out and away from the mass point ...or pinched in towards the mass point.
Be careful looking at GR sites for a view...they do not see it my way ..that is why I ask..the example of the blanket and the incorrect view I suggest is everywhere... but it in my view is wrong and I cant make it fit the rest of the stuff if the blanket idea is right... it can be...
So any views.. other than I am bent:D
alex:):):)
I am now at the point where space time only means to me an inovative geometry that nevertheless overlays up[on space a grid..such to be able to relate points of mass and their relationships within the grid.
When the space time concept is presented we are told that we can visualise the situation as if space were a blanket and that it would distort when mass is placed upon it..in such an example we "see" space is wrapped around the blanket..pushed out of the way by the blanket.
I feel this can not be right... and that if one were to use a blanket and a ball to describe space and mass relationship one ends up with a view that is opposite to what the math/and or the general premise suggests...
I have stated this a few times but no one comes forward and says alex you are the one that is bent not space...
I say that if the blanket is used to describe space it could be best visualised using the props of blanket and ball if one were to place the ball under the blanket so as to show space distorted in a bulge toward the blanket not around it...
Please can anyone understand what I am talking about and / or see the point that the example is misleading???
Or imagine a 2d grid representing one plane... some graph paper.... now if we put a point in there on the graph /grid paper that represents a point of mass how does the grid "bend" ..two choices..out and away from the mass point ...or pinched in towards the mass point.
Be careful looking at GR sites for a view...they do not see it my way ..that is why I ask..the example of the blanket and the incorrect view I suggest is everywhere... but it in my view is wrong and I cant make it fit the rest of the stuff if the blanket idea is right... it can be...
So any views.. other than I am bent:D
alex:):):)