Bert
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Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
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Black Flame?!
A visual effect produced by illuminating a table salt doped alcohol flame which produces the typical orange-y sodium spectrum with a monochrome sodium
spectrum electric light. See attached images, check out the linked short video.
https://youtube.com/shorts/uUGzrS5tpLc?feature=share
Now. Where can I get strontium, barium, boron and potassium spectrum lamps- Or other suitably tunable light sources.
And how did I avoid hearing about this effect before?
Rapopart’s Rules for critical commentary:
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2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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Cathoderay
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It seems Physicists and Chemists do not talk with each other very much.
That is a good demonstration of Absorption Spectroscopy.
https://en.wikipedia.org/wiki/Absorption_spectroscopy
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Sulaiman
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Quote: Originally posted by Bert  |
Now. Where can I get strontium, barium, boron and potassium spectrum lamps- Or other suitably tunable light sources. |
I think that a low cost option is a broad spectrum lamp (tungsten halogen, HID etc), lenses and/or mirrors, a diffraction grating and a couple of
adjustable slits.
And a lot of miscellaneous materials and work.
A spectroscope in reverse.
I'd expect very low light levels, and a not truly monochromatic light spectrum, but may be zdoable.
If as a hobby project then I'd consider making the narrow bandwidth light source easily reversible to be a spectroscope?
And later as a spectrometer?
I'd consider it, but probably never do it 
Other than a few industrial applications, and very specific educational purposes,
I guess that spectral lamps would be high cost per use in an amateur setting.
[Edited on 24-2-2023 by Sulaiman]
CAUTION : Hobby Chemist, not Professional or even Amateur
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j_sum1
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I bookmarked much the same thing a year or so ago intending to show the video to a class. Have not had the opportunity yet.
https://www.youtube.com/watch?v=F0LWtieip9E
I note that there are quite a few videos on this. Most of them shorts.
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wg48temp9
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Mercury vapor behaves similarly with the UV light from a mercury arc lamp but you need a fluorescent screen to see the effect.
See: https://www.youtube.com/watch?v=TZprgqZh4IE
I am wg48 but not on my usual pc hence the temp handle.
Thank goodness for Fleming and the fungi.
Old codger' lives matters, wear a mask and help save them.
Be aware of demagoguery, keep your frontal lobes fully engaged.
I don't know who invented mRNA vaccines but they should get a fancy medal and I hope they made a shed load of money from it.
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Bert
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Registered: 12-3-2004
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Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
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The only tunable monochrome light source I've ever worked with would be a bit... Expensive.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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