[time-nuts] Invariance

[Magnus Danielson]

Brucekareen at aol.com wrote:
> If from relativity theory time is NOT 
> considered invariant, would frequency (in terms of the output of a  cesium 
> standard or hydrogen maser)
>  be considered invariant?

No.

Besides being variant to high-order effects like magnetic field and 
gravity potential, all hyperfine frequencies, for which cesium and 
hydrogen is but a few, is being pulled by a number of finegrained 
effects which still is being worked out and the expansion of the 
universe is expected to take its toll on the frequency. Atomic clocks is 
now a perfect example of a commercialized physics experiment which we 
yeat have to "bottom" in terms of research from both research and 
realization view.

Some researches is about to measure the change of universal "constants" 
as universe expands.

Cheers,
Magnus