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Spectroscopy technique offers a new way to define temperature

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  Spectroscopy technique offers a new way to define temperature Sam Wormley <swormley1@gmail.com> - 2015-10-22 15:15 -0500
    Re: Spectroscopy technique offers a new way to define temperature jimp@specsol.spam.sux.com - 2015-10-22 20:26 +0000
      Re: Spectroscopy technique offers a new way to define temperature Sam Wormley <swormley1@gmail.com> - 2015-10-24 10:09 -0500
        Re: Spectroscopy technique offers a new way to define temperature jimp@specsol.spam.sux.com - 2015-10-24 18:52 +0000

#527499 — Spectroscopy technique offers a new way to define temperature

Spectroscopy technique offers a new way to define temperature
> http://physicsworld.com/cws/article/news/2015/oct/21/spectroscopy-technique-offers-a-new-way-to-define-temperature

> Several groups are attempting to measure Boltzmann's constant in
> different systems. The best measurement to date has an uncertainty of
> less than one part per million. It was made in 2013 by a team led by
> De Podesta, who used the speed of sound in argon gas to deduce the
> constant. In the new research, a team of physicists at several
> Australian universities used a different technique called
> Doppler-broadening thermometry, which relies on the spectral width of
> specific atomic transitions.
>
> The researchers focused on two absorption lines in the caesium
> spectrum, corresponding to the same atomic transition but separated
> by the hyperfine splitting of the excited states. These lines are
> broadened by two underlying effects: the intrinsic uncertainty of the
> state's energy as defined by Heisenberg's uncertainty principle –
> which leads to a Lorentzian distribution – and the fact that, if an
> atom is moving towards or away from the laser, it sees a
> Doppler-shifted laser frequency. This latter effect provides a
> Gaussian variation in the frequencies to which the laser responds.
> The hotter the sample becomes, the faster the particles are moving,
> so this Doppler shift becomes more significant and the peaks become
> broader. By measuring the relationship between peak width and
> temperature, one can deduce the value of Boltzmann's constant.


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#527504

Sam Wormley <swormley1@gmail.com> wrote:
> Spectroscopy technique offers a new way to define temperature

So what is REALLY being measured, temperture or Boltzmann's constant,
spamming shit head?

Have you ever wondered what your life might have been like if you had
the competence to do more than just copy the words of others, spamming
piece of shit?


-- 
Jim Pennino

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#527893

On 10/22/15 3:26 PM, jimp@specsol.spam.sux.com wrote:
> So what is REALLY being measured, temperture or Boltzmann's constant,
> spamming shit head?


   Read the article and find out, jimp. It's not that hard.

   BTW--your obsessive compulsive name calling behavior can be helped
   with these classes, jimp.
> http://www.yellowpages.com/rancho-cucamonga-ca/anger-management-classes


   Spectroscopy technique offers a new way to define temperature
> http://physicsworld.com/cws/article/news/2015/oct/21/spectroscopy-technique-offers-a-new-way-to-define-temperature

 > Several groups are attempting to measure Boltzmann's constant in
 > different systems. The best measurement to date has an uncertainty of
 > less than one part per million. It was made in 2013 by a team led by
 > De Podesta, who used the speed of sound in argon gas to deduce the
 > constant. In the new research, a team of physicists at several
 > Australian universities used a different technique called
 > Doppler-broadening thermometry, which relies on the spectral width of
 > specific atomic transitions.
 >
 > The researchers focused on two absorption lines in the caesium
 > spectrum, corresponding to the same atomic transition but separated
 > by the hyperfine splitting of the excited states. These lines are
 > broadened by two underlying effects: the intrinsic uncertainty of the
 > state's energy as defined by Heisenberg's uncertainty principle –
 > which leads to a Lorentzian distribution – and the fact that, if an
 > atom is moving towards or away from the laser, it sees a
 > Doppler-shifted laser frequency. This latter effect provides a
 > Gaussian variation in the frequencies to which the laser responds.
 > The hotter the sample becomes, the faster the particles are moving,
 > so this Doppler shift becomes more significant and the peaks become
 > broader. By measuring the relationship between peak width and
 > temperature, one can deduce the value of Boltzmann's constant.





-- 

sci.physics is an unmoderated newsgroup dedicated
to the discussion of physics, news from the physics
community, and physics-related social issues.

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#527924

Sam Wormley <swormley1@gmail.com> wrote:

A repaste of the previously snipped cut and paste.

Have you ever wondered what your life might have been like if you had
the competence to do more than just copy the words of others, spamming
piece of shit?


-- 
Jim Pennino

[toc] | [prev] | [standalone]

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