![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||
|
We need graphs/curves of the spectral emissions.- 69.87.203.220 19:54, 25 May 2007 (UTC)
I recently edited this page, removing the incorrect "atomic orbital excitation". This is because incandescence is purely related to black body radiation which produces a continuous spectrum of radiation and has nothing to do with atomic orbital excitation which produces descrete radiation consistent with the specific energy diffenrences in the orbitals. However after making this change, Robin David Saunders reverted the entry back to include this error. I suggest when an expert on this subject reviews this article that they confirm this. - 194.130.163.67 17.31, 07 september 2007(GMT).
Defs on the web, other than the one from wikipedia, are all about visible light, as are the ones in books that I've looked at. So I changed it. Dicklyon ( talk) 21:23, 26 May 2008 (UTC)
I'm not sure if the caption for Image:Incandescence.jpg is correct, or at least it might be misleading and a poor example. IIRC, many metals' colors in flame (sodium, etc., and their ions) are due to electron excitation. It's more common to use the color of metals in flame as an example of excitation and energy levels. It's confusing to discuss the colors of "metal embers", since this other factor comes into play. — AySz88 \ ^-^ 02:42, 8 June 2008 (UTC)
I did not know sun looks yellow. The peak of spectrum of the sunlight is in UV. The blue color of the Bunsen burner has been explained.
That the sun looks red during sunrise and yellow immediately afterwards, is due to atmospheric effects and also Raleigh scattering in the upper atmosphere. These effects are minimum at noon. Ck.mitra ( talk) 16:34, 25 July 2009 (UTC)
I added the info that incandescence becomes visible only around 400°C in the dark. I think it is important to give that as a rule of the thumb. I don't know if a reference is needed; I don't think the issue is very controversial. (I found this reference that says 390°C.) I wrote “most bodies” rather than “all” because a white body doesn't glow at all. Perhaps that could be better worded. David Olivier ( talk) 16:09, 8 June 2009 (UTC) I wish to mention that a "white body", like a "black body" is an idealisation. At a sufficiently high temperature, all "bodies" get closer to "black body" - and an ideal white body does not emit at any temperature.
If we "fit" the emission from a fluorescent lamp to the black body radiation, we get what is called the color temperature and is often printed on the fluorescent tube (often loosely called cool, warm, daylight etc). The fit to the black body radiation os often poor and causes serious problem in photography (too much of green in fluorescent light, mostly due to mercury). Ck.mitra ( talk) 16:34, 25 July 2009 (UTC)
I don't understand the meaning of this sentence "While higher temperatures can increase efficiency, there are currently no materials able to withstand such temperatures which would be appropriate for use in fluorescent lamps."
Should that be "incandescent lamps" at the end of the sentence? Bj norge ( talk) 10:39, 4 February 2010 (UTC)
How is this different from thermoluminiscence? -- 200.59.188.242 ( talk) 19:43, 23 September 2010 (UTC)
Please discuss at Talk:Thermal radiation#Merge with Incandescence? Thanks! -- Steve ( talk) 19:32, 16 December 2011 (UTC)
Incandescence — Preceding unsigned comment added by RaySys ( talk • contribs) 12:11, 10 October 2013 (UTC)
There is no reason for this to be a JPEG or GIF. It can be generated with HTML, which would allow the spelling of Temperature to be corrected. — Preceding unsigned comment added by 137.54.2.208 ( talk) 22:45, 10 March 2014 (UTC)
The article (currently) makes no reference to blackbody. But shouldn't it? DKEdwards ( talk) 07:01, 23 February 2022 (UTC)
I have severe doubts with regards to the colour table. See my comment here: Talk:Red heat#The coloured table image on the right 92.67.227.181 ( talk) 16:28, 7 July 2022 (UTC)
![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||
|
We need graphs/curves of the spectral emissions.- 69.87.203.220 19:54, 25 May 2007 (UTC)
I recently edited this page, removing the incorrect "atomic orbital excitation". This is because incandescence is purely related to black body radiation which produces a continuous spectrum of radiation and has nothing to do with atomic orbital excitation which produces descrete radiation consistent with the specific energy diffenrences in the orbitals. However after making this change, Robin David Saunders reverted the entry back to include this error. I suggest when an expert on this subject reviews this article that they confirm this. - 194.130.163.67 17.31, 07 september 2007(GMT).
Defs on the web, other than the one from wikipedia, are all about visible light, as are the ones in books that I've looked at. So I changed it. Dicklyon ( talk) 21:23, 26 May 2008 (UTC)
I'm not sure if the caption for Image:Incandescence.jpg is correct, or at least it might be misleading and a poor example. IIRC, many metals' colors in flame (sodium, etc., and their ions) are due to electron excitation. It's more common to use the color of metals in flame as an example of excitation and energy levels. It's confusing to discuss the colors of "metal embers", since this other factor comes into play. — AySz88 \ ^-^ 02:42, 8 June 2008 (UTC)
I did not know sun looks yellow. The peak of spectrum of the sunlight is in UV. The blue color of the Bunsen burner has been explained.
That the sun looks red during sunrise and yellow immediately afterwards, is due to atmospheric effects and also Raleigh scattering in the upper atmosphere. These effects are minimum at noon. Ck.mitra ( talk) 16:34, 25 July 2009 (UTC)
I added the info that incandescence becomes visible only around 400°C in the dark. I think it is important to give that as a rule of the thumb. I don't know if a reference is needed; I don't think the issue is very controversial. (I found this reference that says 390°C.) I wrote “most bodies” rather than “all” because a white body doesn't glow at all. Perhaps that could be better worded. David Olivier ( talk) 16:09, 8 June 2009 (UTC) I wish to mention that a "white body", like a "black body" is an idealisation. At a sufficiently high temperature, all "bodies" get closer to "black body" - and an ideal white body does not emit at any temperature.
If we "fit" the emission from a fluorescent lamp to the black body radiation, we get what is called the color temperature and is often printed on the fluorescent tube (often loosely called cool, warm, daylight etc). The fit to the black body radiation os often poor and causes serious problem in photography (too much of green in fluorescent light, mostly due to mercury). Ck.mitra ( talk) 16:34, 25 July 2009 (UTC)
I don't understand the meaning of this sentence "While higher temperatures can increase efficiency, there are currently no materials able to withstand such temperatures which would be appropriate for use in fluorescent lamps."
Should that be "incandescent lamps" at the end of the sentence? Bj norge ( talk) 10:39, 4 February 2010 (UTC)
How is this different from thermoluminiscence? -- 200.59.188.242 ( talk) 19:43, 23 September 2010 (UTC)
Please discuss at Talk:Thermal radiation#Merge with Incandescence? Thanks! -- Steve ( talk) 19:32, 16 December 2011 (UTC)
Incandescence — Preceding unsigned comment added by RaySys ( talk • contribs) 12:11, 10 October 2013 (UTC)
There is no reason for this to be a JPEG or GIF. It can be generated with HTML, which would allow the spelling of Temperature to be corrected. — Preceding unsigned comment added by 137.54.2.208 ( talk) 22:45, 10 March 2014 (UTC)
The article (currently) makes no reference to blackbody. But shouldn't it? DKEdwards ( talk) 07:01, 23 February 2022 (UTC)
I have severe doubts with regards to the colour table. See my comment here: Talk:Red heat#The coloured table image on the right 92.67.227.181 ( talk) 16:28, 7 July 2022 (UTC)