Timeline for Is fire plasma?
Current License: CC BY-SA 3.0
15 events
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| Dec 17, 2019 at 19:10 | comment | added | Microsoft Linux TM | youtu.be/lT3vGaOLWqE?t=360 you can see in this experiment that a conventional lighter flame has enough ions to initiate an arc across two high voltage electrodes even though their voltage isn't enough to initiate the arc otherwise ... | |
| Mar 4, 2015 at 10:31 | review | Suggested edits | |||
| Mar 4, 2015 at 11:14 | |||||
| Nov 5, 2013 at 22:35 | comment | added | Fips | The assumption of "glowing gas" is physically wrong. If you gas would state to glow, it must emit black-body-radiation. This would be in infrared or maximum red - like glowing metal. But you see line-emission - easy verifiable by looking at it trough a prism. The fact that you see coloured flames is due to the fact of recombination and the following transitions. See this experiment for example. | |
| Aug 24, 2013 at 14:39 | vote | accept | daniel.sedlacek | ||
| Sep 4, 2012 at 20:49 | comment | added | Ron Maimon | @Anixx: Of course, but why the sharp change in color? Does the gas abruptly cool down? Why there? I figured it was ionization transition of some kind, but I am not sure anymore. | |
| Sep 4, 2012 at 16:53 | comment | added | Anixx | @Ron, even cold gas is glowing, just in infrared spectrum. | |
| Apr 11, 2012 at 15:35 | comment | added | Ron Maimon | @LevLevitsky: I am not sure--- it might be just outer shell transitions--- but once you ionize once, it is so much easier to eject the electron out teh atom. I am confused now on the issue--- I have found sources going both ways. I though the best thing would be to test conductivity, but somebody did, and said he didn't see conductivity (but this might be a low conductivity), the sharp boundary of the flame, the lack of gradual cooling, suggests that it is some sort of steady-state phase of combustion. It is hard to say if steady state non-equilibrium stuff is this or that. I don't know. | |
| Apr 11, 2012 at 14:54 | comment | added | Lev Levitsky | @Ron, are you sure it's recombination or maybe it's just transitions? I don't have a strong opinion on that, the reason I ask is that I think this might make the difference between fire and plasma (if any). | |
| Apr 10, 2012 at 13:40 | vote | accept | daniel.sedlacek | ||
| Aug 24, 2013 at 14:39 | |||||
| Apr 10, 2012 at 13:40 | vote | accept | daniel.sedlacek | ||
| Apr 10, 2012 at 13:40 | |||||
| Apr 10, 2012 at 13:40 | vote | accept | daniel.sedlacek | ||
| Apr 10, 2012 at 13:40 | |||||
| Apr 10, 2012 at 12:27 | vote | accept | daniel.sedlacek | ||
| Apr 10, 2012 at 12:27 | |||||
| Apr 10, 2012 at 11:12 | vote | accept | daniel.sedlacek | ||
| Apr 10, 2012 at 11:12 | |||||
| Apr 10, 2012 at 4:01 | comment | added | Ron Maimon | I don't think so--- the fire itself has a significant proportion of ionized atoms, it is not just hot gas, because the glow is due to the recombination in particular lines which are dependent on the chemical emission lines (you can see this in burning salt). | |
| Apr 9, 2012 at 22:39 | history | answered | Mitchell | CC BY-SA 3.0 |