This short paper was issued by NIST researchers in 2010, and it discusses making accurate gravitational time dilation / redshift measurements using lasers: http://tf.boulder.nist.gov/general/pdf/2447.pdf
Quoting that paper: > Differences in gravitational potential can be detected by comparing > the tick rate of two clocks. For small height changes on the surface > of Earth, a clock that is higher by a distance Δh runs faster by > > Δf/fo = g Δh/c2 > > where g ≈ 9.80 m/s2 is the local acceleration due to gravity. The > gravitational shift corresponds to a clock shift of about 1.1 × 10−16 > per meter of change in height. So at your laboratory depth of 1.1 km, the fractional frequency change should be about: 1.2 x 10-13 (1.2 parts in 10^13) -- Bill Byrom N5BB On Tue, Feb 21, 2017, at 11:13 AM, Rhoderick Beery wrote: > I'm a physics theorist interested in performing an experiment > to measure > the gravitational time dilation beneath the surface of the > Earth. Boulby > Labs in the UK is 1.1 km down which would generate a time differential > fromthe surface on the order of 1 part in 10^15 -- not much to > work with! _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
