Stephen A. Lawrence wrote:
>> Can someone refresh my memory about the precise time measurements
>> conducted with atomic clocks positioned at different elevations on the
>> surface of Earth.
>
> Gravity or acceleration slow down time.
*WRONG*
A momentarily comoving inertial observer who is colocated with an
accelerating observer will find that their clocks are ticking AT THE
SAME RATE.
Well, for those of us not co-moving, the clock in Boulder, CO gains
15 ns per day compared to the one in Washington DC, because it is
1,600 m higher, and this is widely cited as proof of relativity.
Special relativity I should have said.
Perhaps my way of expressing this does not strictly comport with
theory, but there is no doubt that the higher you go, and the weaker
gravity becomes, the faster clocks go. This becomes a real problem
with the GPS satellite clocks.
- Jed
