Re: [OM] Gravitationals waves--yes they do exist and so do, Black holes

[Chuck Norcutt]

AFAIK the principle way to use interference is nulling the signal.  If 
two waves are overlapped and out of phase by 1/2 a wave length the 
signal will be nulled.  I'm sure that one can probably measure distances 
of less than 1/2 wave but I doubt that that extends very far.
As Larry Plummer said later:  The basis of all this is atom 
interferometry.  I don't know what it is but it must be mucho shorter 
distances than wavelengths of light.
Chuck Norcutt


On 2/14/2016 4:03 PM, Moose wrote:
> On 2/14/2016 11:13 AM, Chuck Norcutt wrote:
> > 10**-20 meter, as Dr. Mike noted, is way, way, way smaller than nano.
> > Nano is only 10**-9.  Pico is smaller but still only 10**-12.  I still
> > can't imagine how anyone is measuring that with lasers.  UV light
> > ranges from 10 to 400 nanometers.  Much worse, even, than trying to
> > measure the size of a virus using a meter stick.  Anyone got an
> > explanation?
> I know absolutely nothing about all this. It does strike, me, as a
> matter of simple physics, that interference patterns may reveal things
> smaller than the wavelengths of the interfering waves - I think. :-)
>
> Why are you folks using the double asterisk, 10**-20, instead of the
> caret, 10^-20 as power notation? The caret is what spreadsheets use, and
> thus what I've used for the several decades. I can't recall the notation
> for the mainframe calculating programs I used before that. Before that,
> it was slide rules ...
>
> Speculative and Curious Moose
--
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