Talk:Caesium standard
This level-5 vital article is rated C-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||||||||
|
Talk[edit]
Re; Using Caesium 133 as the standard second.
I appreciate this is the most accurate way to get close to an actual solar second of earthcentric time, But why don't we use Hydrogen (tritium isotope) as a way to have a common standard time second with the complete universe.
If we did how many Ceasium 133 Seconds would there be in a Tritium Second?
Thanks. Bill in Toronto
- Caesium-133 is a stable isotope. Tritium has a half-life of about 12 years, meaning that every 12 years, you'll have to replace half of it. And it's horribly expensive.
- I'm also confused about your "actual solar second of earthcentric time". The second under SI is a simple measurement of experienced time, defined using Caesium-133. As for a "standard time second with the complete universe", there is none, the passage of time is completely dependent on your local reference frame. Ask Einstein.
- Underjack 02:39, 27 September 2007 (UTC)
Short and long term stability[edit]
It could be useful to say what short and long-term frequency stability caesium clocks can achieve. - Rod57 (talk) 15:57, 17 October 2011 (UTC)
And maybe to mention more stable clocks that have been developed since 1960. - Rod57 (talk) 15:57, 17 October 2011 (UTC)
which Cs clock implementation was actually the first?[edit]
I was working on my PhD thesis and found this page usefull as a start, but it could be incorrect in it's claim of the NPL Cs standard being the first working standard. I have the following referenceCite error: The <ref>
tag name cannot be a simple integer (see the help page). making note of a NBS Cs standard working before the NPL one.
Move article to Caesium atomic clock?[edit]
I think "Caesium atomic clock" is the most WP:COMMONNAME of this device. In addition the existing name Caesium standard is confusing because it is also used for chemical purity standard samples of caesium metal. ChetvornoTALK 11:54, 13 March 2016 (UTC)
- I am going to make the move within a week unless some persuasive reason not to appears. --ChetvornoTALK 13:16, 8 February 2017 (UTC)
So how does it work?[edit]
Lots of fine words about energy levels and other secondary school level physics, but nothing here or anywhere on how a Caesium clock actually measures time? How do we detect these vibrations and how do we count them? And how is that information used to generate a time signal precise enough to reflect the underlying accuracy and be of practical use.Stub Mandrel (talk) 18:46, 25 August 2020 (UTC)
Cesium standard of time measuring when Cs atoms are frozen to almost 0 Kelvin?[edit]
Time measuring 78.154.13.189 (talk) 21:13, 17 April 2022 (UTC)
"the photon absorption by transitions between the two hyperfine ground states of caesium-133 atoms is used to control the output frequency"[edit]
What in the world does that mean? I thought Wikipedia was supposed to be understandable Azbookmobile (talk) 16:46, 22 November 2022 (UTC)
- C-Class vital articles
- Wikipedia level-5 vital articles
- Wikipedia vital articles in Physical sciences
- C-Class level-5 vital articles
- Wikipedia level-5 vital articles in Physical sciences
- C-Class vital articles in Physical sciences
- C-Class Computing articles
- Low-importance Computing articles
- Automatically assessed Computing articles
- All Computing articles
- C-Class Time articles
- High-importance Time articles
- C-Class physics articles
- High-importance physics articles
- C-Class physics articles of High-importance