Try Odoo for yourself: https://www.odoo.com/r/kYo

I love the black flame experiment works because of the sodium absorption and emission spectrums. Glassblower glasses make use of the absorption of Neodymium and Praseodymium to block the sodium glow when working glass.

EnChroma glasses work the way they claim to work. But whether they’re worth buying is another question.

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Chris Wesley’s iPhos Spectrometer can be found here: https://chriswesley.org/spectrometer.htm

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CHAPTERS

00:00 Intro
00:15 Black flame explanation
06:17 Glassblower glasses
09:04 spectroscopy
10:58 Fine structure of Sodium lines (electron spin)
12:30 Spectroscopy of glassblower glasses
14:06 Spectroscopy of EnChroma glasses
17:10 Bunsen burner fact

CORRECTIONS

01:52 Actually about 0.34 attojoules!
11:12 zerodimensional