On 11/3/2014 3:54 PM, Tom Van Baak wrote:
When it comes to frequency standards the official SI second is defined only for sea level. We know time and frequency are "bent" by speed or gravity;
According to the BIPM: "At its 1997 meeting the CIPM affirmed that: "This definition refers to a caesium atom at rest at a temperature of 0 K." - http://www.bipm.org/en/publications/si-brochure/second.html
Isn't weight equivalent to acceleration, and it's therefore not "at rest" when sitting on a table at sea level?
I don't see anything in the BIPM definition of the second regarding sea level.
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