[time-nuts] Einstein Special on PBS
Jim Lux
jimlux at earthlink.net
Sun Nov 29 21:18:21 UTC 2015
On 11/29/15 12:13 PM, Mark Sims wrote:
> Another thing to consider is the gravity anomaly caused by that hunk of granite beneath your clock (or above it in a mine). Hmmm, what is the clock shift at the top of Mt Everest that is due to the mountain and not the altitude?
> _______________________________________________
> t
when going deep..
the Homestake mine in South Dakota is something like 2500m (8000 ft)
deep. There's a DoE funded research facility somewhere deep for nuclear
experiments. There could well be atomic clocks already down there.
https://en.wikipedia.org/wiki/Sanford_Underground_Research_Facility
https://en.wikipedia.org/wiki/Large_Underground_Xenon_experiment is
about halfway down (I think the lower part of the mine is still flooded)
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