Cool, thanks Coign.
I'm confused, the first link says;
Quote:
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The best sphere the ACPO team has ever made had a total out-of-roundness of 35 nanometres. That is, the diameter varies by an average of only 35 millionths of a millimetre, making it probably the roundest object in the world.
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And the second link says;
Quote:
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The roundness delta of the finished sphere (being held above) is about 50 nm on a 93.6 mm diameter. It is believed to be the roundest object in the world.
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These technical writers seem be pretty cavalier about claiming, "roundest object in the world'.
Yesterdays balls were round within 40 atomic layers, and I have no idea how to compare nanometers to atomic layers. I suppose it would make a difference what material it was 40 atomic layers of.
Anyway, my balls ain't round.