[time-nuts] "When you google word ..."

[Hal Murray]

fiber.guru at fiber.guru said:
> One thing that was pretty cool is that NIST developed a fountain clock that
> is so accurate it is influenced by altitude.  They had to raise the clock
> once to install a new floor beneath and when they raised the clock it
> impacted the frequency.  Originally discouraged by this it suddenly occurred
> to someone that they had developed an extremely accurate way to measure
> height!  Now they just have to miniaturize it and make it affordable (of
> course this is the bane of laboratory experiments). 

Time Too Good to Be True, Daniel Kleppner
Physics Today, March 2006, page 10
https://physicstoday.scitation.org/doi/10.1063/1.2195297



-- 
These are my opinions.  I hate spam.