Unlabeled

Where hot things glow brightest: 10 stars, a halogen lamp and basalt lava

Rigel's glow peaks at 239 nm, in the ultraviolet, and the Sun's at 502 nm. A halogen lamp at 2,900 K peaks at 999 nm, in the infrared, out of sight.

What does this axis measure?
What does this axis measure?
Where hot things glow brightest: 10 stars, a halogen lamp and basalt lava: 12 points, a scatter chart.
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Wavelength of brightest glow (nm)
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Temperature (K)
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The data: 12 points
Temperature (K)Wavelength of brightest glow (nm)
1,5001,932
2,1001,380
2,5251,148
2,900999
3,306877
3,654793
4,251682
5,772502
6,654435
9,550303
9,797296
12,130239
Source
Wikidata, star temperatures (CC0), and Wikipedia, Orders of magnitude (temperature) (CC BY-SA 4.0), lava and lamp temperatures; peak wavelengths, and glow colors from the CIE 1931 color-matching functions (CC BY-SA 4.0, DOI 10.25039/CIE.DS.xvudnb9b), calculated by Unlabeled via no source for the lava and lamp items; on Wikidata, a published paper for each star
Licence
CC-BY-SA 4.0 (Wikipedia: 2 temperatures read from a list; CIE: the color-matching functions behind the glow colors); CC0 1.0 (Wikidata: 10 star temperatures read); the wavelengths computed by Unlabeled with Wien's displacement law (CODATA 2018 constant)
Read
2026-11-05
Drawn
12 points as the puzzle showed them · scatter
  • Ran in puzzle #42 on November 7, 2026. Play it