Timeline for Is the sensitivity of the LIGO sensitive enough to measure the "expansion of the universe"? What specifically is the numerical ratio of effects?
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| Sep 19, 2022 at 22:35 | answer | added | benrg | timeline score: 1 | |
| Apr 13, 2017 at 12:39 | history | edited | CommunityBot |
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| Feb 16, 2016 at 17:10 | history | edited | Fattie | CC BY-SA 3.0 |
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| Feb 16, 2016 at 17:05 | history | edited | Danu | CC BY-SA 3.0 |
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| Feb 13, 2016 at 22:37 | vote | accept | Fattie | ||
| Feb 13, 2016 at 18:59 | history | edited | Fattie | CC BY-SA 3.0 |
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| Feb 13, 2016 at 18:53 | history | edited | Fattie | CC BY-SA 3.0 |
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| Feb 13, 2016 at 18:52 | comment | added | Fattie | Note, here in this question, I really just want to know the values involved - given that we have agreed figures the expansion of the spacetime metric ("whatever the hell that is"), how does that "expansion of the LIGO arms" compare to the "expansion of the LIGO arms measurement ability". I just want figures (A) and (B)! :) | |
| Feb 13, 2016 at 18:49 | comment | added | Fattie | Indeed note my own question here physics.stackexchange.com/q/223610 and the answer I included re the paper where the authors say spacetime expansion is a crap description (i.e.: "does not happen"). | |
| Feb 13, 2016 at 18:49 | comment | added | Fattie | Hi @rob - right, in relation to your linked answer. note that one of the commentors says, "It is not that gravtiational/thermal motion dominates over cosmological expansion in gravitationally bound systems, it simply turns it off" - there is then some discussion over which of those two paradigms is the case. I have given up on trying to work out which of those is the case :O | |
| Feb 13, 2016 at 16:43 | comment | added | rob♦ | Related | |
| Feb 13, 2016 at 16:31 | answer | added | Everett You | timeline score: 4 | |
| Feb 13, 2016 at 16:11 | comment | added | Fattie | It does seem astounding to me that the LIGO device is easily sensitive enough, to measure the expansion of the universe in realtime assuming it's paradigm made that possible. Amazing. | |
| Feb 13, 2016 at 16:07 | history | edited | Fattie | CC BY-SA 3.0 |
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| Feb 13, 2016 at 16:01 | history | edited | Qmechanic♦ | CC BY-SA 3.0 |
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| Feb 13, 2016 at 15:59 | comment | added | Fattie | Anna, there's only one dictionary :) wibble |ˈwɪb(ə)l| verb [ no obj. ] Brit. informal 1 wobble; quiver. It's commonplace in English that the noun is the same as the verb (chant, yawn, run). | |
| Feb 13, 2016 at 15:55 | history | edited | Fattie | CC BY-SA 3.0 |
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| Feb 13, 2016 at 15:49 | comment | added | anna v | from the webster.com on "wibbles" :The word you've entered isn't in the dictionary . Do you mean "wiggles" wiggle is a verb, not a noun, " to move to and fro with quick jerky or shaking motions" | |
| Feb 13, 2016 at 15:43 | history | edited | Fattie | CC BY-SA 3.0 |
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| Feb 12, 2016 at 20:31 | answer | added | levitopher | timeline score: 4 | |
| Feb 12, 2016 at 19:56 | comment | added | Fattie | Hmm, surely the idea is the detector arms were (as I say) "distorted" (bent, stretch squeezed, something) in some way so that the two interferometer paths were different??? | |
| Feb 12, 2016 at 19:56 | comment | added | CuriousOne | There are two answers to this: 1) There is no expansion where we are. Expansion can only happen in systems that are not gravitationally bound. 2) Can a microphone measure continental drift? No it can not because continental drift is too slow. For the same reason LIGO could also not (at least not directly) measure the expansion of the universe, even if it weren't in the wrong place... it's just not sensitive enough for that purpose. | |
| Feb 12, 2016 at 19:24 | history | asked | Fattie | CC BY-SA 3.0 |