Black holes and the elasticity of space time

[sageoffools]

<p>Hi All,</p><p>I have been thinking about black holes, white holes and the elasticity of space-time for a while and a nagging question keeps coming up:</p><p>It is obvious that space-time is elastic, which also means that, if stretched, it will revert back to its original form.&nbsp; When a black hole is created, my understanding of the theory is that it draws in matter from space, filling the black hole until eventually the mass grows so much that it tears space-time and begins to dump the matter through the white holes. The question I had was, if this theory is correct, and if my understading of it is correct, at some point, wouldn't the elasticity of space-time overcome the gravitational force of the matter and "snap" back into position, ejecting the matter back into space?&nbsp;</p>

 

[derekmcd]

<p>Welcome to the boards sageoffools </p><p><strong>"It is obvious that space-time is elastic, which also means that, if stretched, it will revert back to its original form."&nbsp;&nbsp;</strong> </p><p>Spacetime isn't something physical.&nbsp; While it might be useful as an analogy to describe it as a rubber sheet, it is really nothing more than a mathematical contruct usually referred to as a dimension or a manifold.&nbsp; Using the term 'fabric' to describe spacetime is just a pleasant sounding adjective.</p><p><strong>"When a black hole is created, my understanding of the theory is that it draws in matter from space, filling the black hole..."</strong></p><p>Black holes do not physically draw in matter.&nbsp; They affect the geometry of spacetime so that the geodesic paths that matter follow become tighter as you approach the black hole.&nbsp; Passing the event horizon, all paths lead to the singularity.&nbsp; Black holes gravitational forces work the same way any other massive object works.&nbsp;</p><p><strong>"...until eventually the mass grows so much that it tears space-time and begins to dump the matter through the white holes."</strong> </p><p>I don't believe there is anything in our known physical world that would allow for a white hole.&nbsp; Although, it is theorized that black holes can 'shed' their mass through Hawking Radiation.&nbsp;</p><p><strong>"The question I had was, if this theory is correct, and if my understading of it is correct, at some point, wouldn't the elasticity of space-time overcome the gravitational force of the matter and "snap" back into position, ejecting the matter back into space?"</strong>&nbsp; </p><p>The question of spacetime collapsing is reference to the critical density of the Universe and whether there is enough mass to make it collapse.&nbsp; Current measurements by WMAP indicate that the Universe will, likely, expand forever as there isn't quite enough matter within the universe for gravity to overcome the expansion.&nbsp;</p> <div class="Discussion_UserSignature"> <div> </div><br /><div><span style="color:#0000ff" class="Apple-style-span">"If something's hard to do, then it's not worth doing." - Homer Simpson</span></div> </div>

 

[weeman]

"<strong>Black holes do not physically draw in matter.&nbsp; They affect the geometry of spacetime so that the geodesic paths that matter follow become tighter as you approach the black hole.&nbsp; Passing the event horizon, all paths lead to the singularity.&nbsp; Black holes gravitational forces work the same way any other massive object works."</strong>&nbsp;<br /><br />Very well put. <img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-smile.gif" border="0" alt="Smile" title="Smile" /> <div class="Discussion_UserSignature"> <p> </p><p><strong><font color="#ff0000">Techies: We do it in the dark. </font></strong></p><p><font color="#0000ff"><strong>"Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.</strong><strong>" -Albert Einstein </strong></font></p> </div>

 

[pradipta]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Hi All,I have been thinking about black holes, white holes and the elasticity of space-time for a while and a nagging question keeps coming up:It is obvious that space-time is elastic, which also means that, if stretched, it will revert back to its original form.&nbsp; When a black hole is created, my understanding of the theory is that it draws in matter from space, filling the black hole until eventually the mass grows so much that it tears space-time and begins to dump the matter through the white holes. The question I had was, if this theory is correct, and if my understading of it is correct, at some point, wouldn't the elasticity of space-time overcome the gravitational force of the matter and "snap" back into position, ejecting the matter back into space?&nbsp; <br />Posted by sageoffools</DIV> <span style="font-size:10pt;color:black;font-family:Verdana">Everything has a limited shape. Our universe has also a limited shape.</span><span style="font-size:10pt"><font face="Times New Roman"> </font></span><span style="font-size:10pt;font-family:Verdana">Since the ancestral time, world space research is progressing on wrong concept<span>&nbsp; </span>because we unknown about space mirror which is a great mystery and creator of lots of mysteries viz. milk ways, galaxies, supernovas, nebulas, white dwarfs, black holes etc. Hence without study of space mirror the space research has no future.</span><span style="font-size:10pt;font-family:Verdana">&nbsp;</span><span style="font-size:10pt;font-family:Verdana">It can not explain in short. Therefore it invites to visit http://www.spacemirrormystery.com to know the logic and original truth. <span>&nbsp;</span></span><font face="Times New Roman" size="3">&nbsp;</font><br /> <div class="Discussion_UserSignature"> <p>pradipta</p> </div>