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0 pointsmehrdadn6y ago0 comments

> We have clocks which can measure it over just a few feet of height difference

Wait, seriously? Do you have a link??

0 comments

Measuring the height of a mountain with a portable atomic clock (1000m accuracy) https://www.nature.com/articles/s41567-017-0042-3

NIST measuring speed differences < 10 m/s and height < 1 m with a pair of atomic clocks https://science.sciencemag.org/content/329/5999/1630.long

Tests of gravitational time dilation are also within the reach range of enthusiastic amateurs using second-hand atomic clocks:

Or if you prefer non-PDF:

Amazing. They observe fractional frequency changes of around 4.1E-17. Thanks for sharing the links!

Couldn't see that number in the info at the link above, is that from the full article?

j / k navigate · click thread line to collapse

Measuring the height of a mountain with a portable atomic clock (1000m accuracy) https://www.nature.com/articles/s41567-017-0042-3

NIST measuring speed differences < 10 m/s and height < 1 m with a pair of atomic clocks https://science.sciencemag.org/content/329/5999/1630.long

Tests of gravitational time dilation are also within the reach range of enthusiastic amateurs using second-hand atomic clocks:

Or if you prefer non-PDF:

Amazing. They observe fractional frequency changes of around 4.1E-17. Thanks for sharing the links!

Couldn't see that number in the info at the link above, is that from the full article?

j / k navigate · click thread line to collapse