Talk:Spectroscopy

SPR

My wife, a biochem major, was looking for a definition of SPR spectroscopy here, but didn't find one. Is it under a different name, or does it need to be added to the article? Jwrosenzweig 01:32, 9 Mar 2005 (UTC)

Thermal spectral smear?

If a substance is sufficiently hot, will the thermal-kinetic energy of its component atoms smear out its spectral lines? However, according to Boltzmann_distribution#typical speed, a gas would have to be circa 1e15 K for this to be a significant problem, at which point the gas will not be an ideal gas. CS Miller 19:25, July 13, 2005 (UTC)

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Titanium dioxide food additive to powdered sugar

It might be interesting and informative to add some commentary about how absorption and emission spectroscopy is utilized in food additives, such as the spectra of titanium dioxide (photo) which is added to powdered sugar for doughnuts due to the emission spectra which makes white powdered sugar adopt a "glow" attribute when added.

The use of such additives can be controversial (Dunkin doughnuts) but it is still a multi-billion dollar (globally) application of spectroscopy utilized in corporate science labs to make foods appealing and to acquire an economic advantage utilizing science -- and human behavioral psychology. SoftwareThing (talk) 18:59, 7 September 2018 (UTC)

There is a sentence about, "Measurement of different compounds in food samples by absorption spectroscopy both in visible and infrared spectrum". Praemonitus (talk) 16:02, 21 January 2026 (UTC)

Image: High resolution spectrum of the Sun

Can anyone explain the image: High resolution spectrum of the Sun, showing the discrete line pattern created by elements in the stellar atmosphere? I understand the bands in spectrographs to be colors, not pass diagonally through single colors. OzExplorer (talk) 14:31, 26 January 2026 (UTC)