Re: [Phys-l] Cosmic background radiation

[Stefan Jeglinski <jeglin@4pi.com>]

> The distinction I'm making is important, because if our rulers
> etc. expanded along with the universe, the expansion would be
> unmeasurable and indeed meaningless.

Are you saying that if we only had the technology to measure an 
expansion small enough (I suppose over a time scale necessary to 
"see" it, namely one's lifetime), that we could measure the expansion 
of the universe with a ruler?

I thought the issue was more tricky than this. Is is not space that 
is expanding, hence leading to a problem measuring the expansion with 
a ruler, even in principle?


Stefan Jeglinski