Timeline for Is it true that gravitational lensing only occurs for objects made of plasma?
Current License: CC BY-SA 3.0
15 events
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| Oct 29, 2014 at 4:53 | comment | added | anna v | @honeste_vivere to get to the phase of matter that is plasma one needs very high temperatures. Temperatures at a distance from active stars are of the order of 3Kelvin. there is a phase diagram plot here opencourse.info/astronomy/introduction/08.matter_phases . A lot of energy has to be supplied to keep the charges separate. | |
| Oct 28, 2014 at 23:50 | comment | added | honeste_vivere | I should clarify. I do not think the existence of plasma in these regions would support Dowdye's arguments. That link has so many contradictions and logical flaws that it was difficult read. I was just curious, for my own sake, whether the gas in interstellar space outside of galaxies was ionized or not. | |
| Oct 28, 2014 at 23:27 | comment | added | honeste_vivere | @annav - I do not want to cause confusion, but I am not sure it is accurate to claim that plasma does not exist around galaxies and clusters of galaxies. Are you saying that most of the gas in these regions has recombined into a neutral state (different from quasi-neutrality used for plasmas)? It doesn't matter so much for the answer to the question as it does for my curiosity. | |
| Jun 18, 2014 at 5:48 | comment | added | 299792458 | @ anna v - Thanks for educating. I'm ambivalent on the issue. Nevertheless, truce. :) | |
| Jun 17, 2014 at 18:03 | comment | added | anna v | hubblesite.org/newscenter/archive/releases/2003/01/image/a | |
| Jun 17, 2014 at 16:08 | comment | added | Muhammad Umer | can you provide some link to study or anything scientific where lens effect was observed for object that was Not surrounded by plasma? | |
| Jun 17, 2014 at 16:04 | comment | added | anna v | I have stated in my answer that the premise that the universe is full of plasma is against observations , imo. | |
| Jun 17, 2014 at 16:01 | comment | added | Muhammad Umer | @annav and i am not saying you are discussing that (mental isses) please read. He is not disputing einstein, he is in fact targeting general relativity. And what i am interested in is whether his premise is true or not... i don't care what it 'sounds' like. I don't follow einstein religion. I prefer to look at all claims case by case. | |
| Jun 17, 2014 at 14:03 | comment | added | anna v | going back to the mainstream question, it seems it is a policy discussed at the META site meta.physics.stackexchange.com/questions/4538/… | |
| Jun 17, 2014 at 6:01 | comment | added | anna v | I am not talking about einstein having mental issues. It is the person who wants to get better than Einstein who has mental issues. As to his argument, plasma is not existing in the large distances between galaxies and clusters of galaxies so his proposal that that is what makes lensing is wrong. it is not a mainstream interpretation of the data from astrophysics. There are alternative cosmolgogies, en.wikipedia.org/wiki/Plasma_cosmology, but the majority of the astrophysics community does not adopt it. | |
| Jun 17, 2014 at 5:51 | comment | added | 299792458 | +1 for the crackpot index itself. However, if you retain that string ''... which is what we discuss here'', don't you think you are bound to have people falling prey to item no. 28 in that index? Reverse psychology, is it? :) | |
| Jun 17, 2014 at 5:49 | comment | added | Muhammad Umer | The author is clearly arguing that general relativity is wrong because supposedly major and only type of evidence has alternative explanation. He no where said einstien had mental issues or anything like that. | |
| Jun 17, 2014 at 5:18 | comment | added | anna v | People who come out using "disputing Einstein" have a chip on their shoulder. If you have a good alternate theory you should dispute general relativity, not the long dead Einstein. I am saying that plasma is not around galaxies and clusters of galaxies. It is hot matter ejected by stars as the sun. The sun experiment has not even been run yet. The data we have are from galaxies. | |
| Jun 17, 2014 at 4:20 | comment | added | Muhammad Umer | No need to be all apologetic, it's not personal to me one way or another. I would like to know if you are saying that his claim "..show that a phenomenon known as gravitational lensing does not take place as described by relativity theory" is invalid. And can you provide source for that this forum is only for mainstream physics, what is mainstream?..Also i didn't get what you meant by notice the title? What are you implying? | |
| Jun 17, 2014 at 4:13 | history | answered | anna v | CC BY-SA 3.0 |