Does gravity work differently under the surface? Maybe the redshift is
different going below the surface.

<https://i.stack.imgur.com/yJbbk.jpg>

On Wed, Feb 22, 2017 at 3:22 AM, Bill Hawkins <bill.i...@pobox.com> wrote:
> In the confusion, I forgot that we are concerned with gravitational time
> dilation, not time of flight.
>
> The University of Minnesota has a lab about 2500 feet down in the Soudan
> mine. The following is their brief description:
>
> "The Soudan Underground Laboratory is a general-purpose science
> facility, which provides the deep underground environment required by a
> variety of sensitive experiments."
>
> Here's a link to the Soudan page:
>  https://www.physics.umn.edu/outreach/soudan/tour/
>
> Why is it named Soudan? The original miners found northern Minnesota to
> be extremely cold at times, so they named the town for someplace warm.
>
> Let me know if you are seriously considering this, and I will find a
> contact for you.
>
> Bill Hawkins
>
> -----Original Message-----
> From: Bill Hawkins [mailto:bill.i...@pobox.com]
> Sent: Tuesday, February 21, 2017 8:08 PM
>
> Neutrinos? Look up the OPERA experiment that measured neutrinos going
> faster than light. Turned out to be a loose optical fiber connector to a
> timing instrument.
>
> Fermi Lab has/had the MINOS experiment going 500 miles from Chicago to a
> mine in northern Minnesota. The generated neutrinos go through Wisconsin
> but are not noticed there, AFAIK.
>
> Bill Hawkins (Resident of Minnesota, but not a physicist, just a BSME)
>
>
> -----Original Message-----
> From: Bob Stewart
> Sent: Tuesday, February 21, 2017 1:48 PM
>
> Hi,
> Have you been in touch with Fermi-Lab?  They run a neutrino experiment
> with a receiver somewhere underground in Wisconsin.  At least that's
> what I recall.  I used to live next to a Physics professor who has a
> minor part in the experiment.  I'm not even sure what sort of data they
> collect there; whether it's time or something else.
>
> Bob Stewart (Not a physicist)
>
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