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Topic: How precisely can a right angle be measured?
Replies: 9   Last Post: Apr 6, 2013 3:48 PM

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Tom Potter

Posts: 497
Registered: 8/9/06
Re: How precisely can a right angle be measured?
Posted: Apr 3, 2013 6:56 AM
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"Poutnik" <poutnik@privacy.invalid> wrote in message
> 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

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