Talk:Photometer

??

the easiest way to describe the photometer is by increasing the intensity of a light source, a light dependant resistor contained inside will lower the resistance...

  high intensity - low resistance and high current
  low intensity  - high resistance and low current

Photometers in photography

It is my understanding that photometers are quite regularly used in measuring ambient light levels of scenes intended to be photographed.

The main article could be improved if there were a paragraph on commercial grade photometers used in photography, and the shooting of cinema.

If modern photometers rely upon charge coupled devices (or CCDs), do they ever "burn out" by pointing at the sun? at campfires? at a lit match?198.177.27.18 (talk) 03:49, 26 May 2008 (UTC)

That's covered at Light meter. I added a link there. Perhaps the two articles should be merged, though. It's not clear to me if there is a distinction between a photometer and a light meter.--Srleffler (talk) 05:00, 26 May 2008 (UTC)

A light meter is a photometer, but a photometer is not necessarily a light meter: an instrument to measure light absorption/transmission or light reflctance in UV, vis or IR is not included in the term light meter. Another distinction that is getting increasingly blurred it that between spectrophotometer and spectrograph: traditionally, a spectrophotometer resolves light wavelength by wavelength using a prism or grating and normally measures the light absorption in the sample, while a spectrograph after resolving the spectrum projects it on a film. In the projected image, spectral lines can be seen that are characteristic of given elements. The spectrograph is thus typically used for qualitative analysis of emission spectra (or absorption spectra in the light from stars). With the advent of arrays of light sensitive elements, an array spectrophotometer measures the whole spectrum at once, but makes the quantitative measurements of a spectrophotometer. Therefore the terminology is also getting mixed up and the distinction between spectrograph and spectrometer is lost.Lave (talk) 09:14, 13 December 2008 (UTC)

I agree. This article has been broadened quite a bit since I wrote the comment above. I do wonder, though, if it would be better to distinguish photometers from spectrophotometers and focus this article on the former.--Srleffler (talk) 15:43, 13 December 2008 (UTC)

Nod to the German wiki

I note that the German version of this article is much more complete: https://de.wikipedia.org/wiki/Photometer

Anyone with the interest may want to copy over content.J1812 (talk) 20:52, 2 October 2013 (UTC)

Bunsen's grease spot photometer

Bunsen's grease spot photometer should apparently be in the Article. Mentioned in https://wiki.riteme.site/wiki/1844_in_science#Physics http://www.phy6.org/outreach/edu/greaspot.htm https://www.curiousminds.co.uk/vintage-bunsen-grease-spot-photometer.html https://www.nature.com/articles/040174d0 https://eudict.com/?lang=engtam&word=bunsens%20grease%20spot%20photometer etc. The connection with Robert Wilhelm Eberhard Bunsen needs to be fully verified since there must have been other Bunsens. 94.30.84.71 (talk) 19:05, 13 February 2019 (UTC)

LLM Revert

Regarding this revert by me. I have now reviewed the administrator's noticeboard discussion on this incident. When blanket reverting like this, you ought to reference the discussion that authorized the revert.

I have reviewed the AI-generated intro material and feel it is adequate. I recommend leaving it in.--Srleffler (talk) 05:30, 23 July 2023 (UTC)