millimicrons
millimicrons
So I guess nanometers is a newer term?
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Re: millimicrons
You guess correctly, Bob
Source: https://en.wikipedia.org/wiki/Metric_prefix
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MichaelG.
Edit: see also https://en.wikipedia.org/wiki/Nanometre
.The SI prefixes are metric prefixes that were standardized for use in the International System of Units (SI) by the International Bureau of Weights and Measures (BIPM) in resolutions dating from 1960 to 1991.[2]
Source: https://en.wikipedia.org/wiki/Metric_prefix
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MichaelG.
Edit: see also https://en.wikipedia.org/wiki/Nanometre
Too many 'projects'