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Re: How precisely can a right angle be measured?
Posted:
Apr 3, 2013 6:56 AM


"Poutnik" <poutnik@privacy.invalid> wrote in message news:MPG.2bc53fb062451f1810a7@news.eternalseptember.org... > > Absolutely Vertical posted Tue, 02 Apr 2013 09:25:01 0500 > >> >> > I know how to create an ORTHOGONAL standard >> > that is accurate to 1x10^10 or better, >> > >> >> why do you think such a standard is required? > > I suppose it would be very challenging > wrt material, thermal and mechanical stability. > > Regarding wavelength multiples as Will mentioned.... > > If Tom wants 10^10 precision ( accuracy is different story ), > the requirement is roughly > 1m versus 0.1 nm  1 small atom, or > near 6 km versus 579 nm of sodium D line. > > Or multiple of above for multiples of WLs. > >  > Poutnik
Actually you can establish an extremely precise ORTHOGONAL standard for very little money.
 Tom Potter
http://thecloudmachine.tk http://tiny.im/390k



