Re: Simple question about relativity and space time
- From: Paul Cardinale <pcardinale@xxxxxxxxxxxxxxx>
- Date: Tue, 5 Feb 2008 08:24:03 -0800 (PST)
On Feb 5, 5:09 am, "N:dlzc D:aol T:com \(dlzc\)" <dl...@xxxxxxx>
wrote:
Dear reginald.louis:
<reginald.lo...@xxxxxxxxx> wrote in message
news:d65ce8ab-80ff-40ce-a602-07133033ec49@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
...
I have a question about relativity and space-time.
I watch a science emission about finding the true
*nature* of gravity. I learned that time run slower
in the surface of the earth than higher in the sky
(where for example GPS satellite are). For this
reason, they must regularly sync these GPS
satellite clock with the time in earth or else, we
would see a drif of several kilometer per days in
our driving direction.
Yes, these orbitting clocks have a few extra "ticks" in each
second, and they are adjusted periodically to keep the same time
as down here on Earth.
Not exactly. The adjustments are not made periodically, but on an as-
needed basis (typically about every few month) due to drift in the
clocks.
Paul Cardinale
.
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