Wikipedia:Reference desk/Archives/Science/2024 August 4

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August 4

density of solid tritium

Has anyone ever actually measured this? I've only seen the density of the liquid discussed in the literature. Double sharp (talk) 07:08, 4 August 2024 (UTC)

see https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4922399/ where they measured the molar volume, effect of pressure and temperature on volume. Also see https://link.springer.com/article/10.1007/BF00683620 . Graeme Bartlett (talk) 11:01, 4 August 2024 (UTC)

Interferometer116.68.77.174 (talk) 17:48, 4 August 2024 (UTC)

My company got a new project - milk analyzer using FTIR spectroscopy. Now we are conducting a research about interferometer for this milk analyzer and got informations like beamsplitter - [material : KBr or other material that transmit and refract IR beam of 2.5 to 20um wavelength, 50/50 beam splitting coating, anti-reflective coating in mid IR region flatness-1 um for 10um lambda, smoothness-RMS roughness of less than 10nm, thickness- 1 to 5mm]; lens - [plano convex lens that should effectively transmit 2.5 to 20um range wavelength effectively]; Compensating Plate : [Material : Same as beamsplitter, Coating: anti-reflective in the mid-IR range, Anti-reflective coating : Effective in mid IR range, Flatness : 1um for 10um lambda, Smoothness : RMS roughness of less that 10nm, Thickness : match the optical path length difference introduced by your beam splitter]; Mirror: [Reflectance max from 2µm to 20µm, Flatness : 1um for 10um lambda]. Should I proceed with finding optics with these specifications? Do the provided details suffice to initiate the process? And also 2 mirrors are used in this interferometer. One is fixed and other is have a linear motion. When I asked the displacement range of moving mirror in chatgpt 1st time it replied as 0.625mm to 1.25mm. I again asked this question and it replied as 'in a Michelson interferometer, the moving mirror displacement is often around a few millimeters to achieve the desired spectral resolution. Specifically, a displacement range of 1 to 5 millimeters is common, though some high-resolution instruments may require larger displacements.'. I am confused. What is your opinion about this? 116.68.77.174 (talk) 17:48, 4 August 2024 (UTC)

My opinion is that it is unsafe to rely on ChatGPT for any project-critical information. It can however be a useful source of links that you will have to trace and verify. In Wikipedia find Michelson interferometer and FTIR (Fourier-transform infrared spectroscopy). External links that I think may help are: Fourier Transform Infrared Spectroscopy as a Tool to Study Milk Composition, Standardization of milk mid-infrared spectra from a European dairy network, Visible and near-infrared spectroscopic analysis of raw milk for cow health monitoring: Reflectance or transmittance? and Human Milk Analysis Using Mid-Infrared Spectroscopy. Philvoids (talk) 23:32, 4 August 2024 (UTC)

IMO one cannot rely on ChatGPT for any factual information, critical or not. It may answer any factual question in an authoritative tone with something that sounds plausible but has no relation to reality.  --Lambiam 23:39, 5 August 2024 (UTC)

It sounds like ChatGPT is ready to run for public office. ←Baseball Bugs ^{What's up, Doc?} carrots→ 23:55, 5 August 2024 (UTC)

Villar A, Gorritxategi E, Aranzabe E, Fernández S, Otaduy D, Fernández LA (December 2012). "Low-cost visible-near infrared sensor for on-line monitoring of fat and fatty acids content during the manufacturing process of the milk". Food Chemistry. 135 (4): 2756–60. doi:10.1016/j.foodchem.2012.07.074. PMID 22980869. Philvoids (talk) 13:53, 6 August 2024 (UTC)