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| Posted By: motley crue Posted On: Mar 12, 2008 Views: 1819 | fundamental what came first gravity or matter/energy. because if gravity came first that means that Eistein was wrong in general relativity because there would be no matter to create the gravity. |
| Posted By: motley crue Posted On: Mar 13, 2008 Views: 1816 | RE: fundamental sorry for not put ? on my question. |
| Posted By: motley crue Posted On: Mar 13, 2008 Views: 1813 | RE: fundamental can someone please answere my ****in question. |
| Posted By: Andres Posted On: Mar 13, 2008 Views: 1806 | RE: fundamental Gravity is a consequence of the presence of matter, is the curvature of space-time caused by objects in the universe. It couldnt have come first. |
| Posted By: motley crue Posted On: Mar 13, 2008 Views: 1800 | RE: fundamental Ok, i was agueing with some one and he said that gravity has to come first in order for mass to atract other mass. Tell me if im right. the three forces that act at the subatomic level are strong and weak nuclear force and electromagnetism. if these forces are keeping the atom held together then gravity does not need to come first. these forces will atract other atoms. the mass gets more complex then you have gravity, which proves that Eistein is rihgt, my freind said Eistein was wrong because he said that that mass wont atract without gravity. my friend said that astronomers have found places in the universe that there is 0 mass, but he's not concidering exoctic particles that astronomers havnt discovered yet. |
| Posted By: Andres Posted On: Mar 13, 2008 Views: 1794 | RE: fundamental Gravity cannot come first. As I said before, its a CONSEQUENCE of the presence of matter and energy in a region of space. It wouldnt be any gravitational field in a certain region of space if it wasnt because theres an object with mass there. Every physical body in the universe is distorting the space-time via its mass, causing what is called a gravitational field. Gravity cannot exist without matter, at least thats what I know so far. Physicists still have some concerns related to gravity though. I assume that your friend must fully understand Einsteins theory of gravity, in order to say that he is wrong, because you shouldnt question something that you dont understand. That is something that I have seen in this site a lot of times, people trying to find mistakes in Einsteins theory, instead of trying to fully understand it first, which is very difficult. |
| Posted By: Andres Posted On: Mar 13, 2008 Views: 1791 | RE: fundamental ...in order to say that he WAS wrong* |
| Posted By: Andres Posted On: Mar 13, 2008 Views: 1782 | RE: fundamental In other words,if he doesnt fully understand Einsteins theory, he is not allowed to question it. |
| Posted By: motley crue Posted On: Mar 14, 2008 Views: 1776 | RE: fundamental yes i know, i guess he's just trying to prove Eistein was wrong. |
| Posted By: Andres Posted On: Mar 14, 2008 Views: 1769 | RE: fundamental Yes,but I think he should focus on something else, and the time he is wasting to disprove the most successful gravitational theory, use it to understand it, unless he already knows very well general relativity, but, considering what he told you, i dont think thats the case. Anyway, like I said before, there are still some issues with gravity that physicists cant explain. |
| Posted By: motley crue Posted On: Mar 14, 2008 Views: 1766 | RE: fundamental Well, like what? |
| Posted By: Andres Posted On: Mar 14, 2008 Views: 1763 | RE: fundamental Einsteins theory of gravity explains how this force works, how it is deeply related to space-time, but theres nothing clear yet about its composition and its nature. However, don't confuse this with your original question. It is known that gravity cannot exist without matter. Not even space-time can exist without matter. Also, this theory of gravity raises a lot of contradictions when it is applied to the quantum level. Thats why an exact theory of quantum gravity that can help us understand it better is required. |
| Posted By: Andres Posted On: Mar 14, 2008 Views: 1760 | RE: fundamental ....without matter and ENERGY* |
| Posted By: motley crue Posted On: Mar 14, 2008 Views: 1754 | RE: fundamental space-time can exist without matter. you can have a 0 matter and 0 energy univers and still space-time will exist because its independent from matter and energy. |
| Posted By: Andres Posted On: Mar 14, 2008 Views: 1749 | RE: fundamental You couldnt be more wrong about that. The theory of relativity clearly states that if you could make disappear all the matter of the universe, then the universe would stop existing as well. Space-time is not independent from matter and energy, not at all. It couldnt exist without events taking place in it. Besides, just tell me how could time exist without objects in motion? Again, as in your topic of dimensions, youre having a problem with the concept of time, and theres where your misunderstanding of this lies. You should look it up. |
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