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- #101
True! I actually mentioned that the micron was an extension of the metre, so I'm sorry if it came out wrong.
When measuring in microns, I think the um symbol is applied for the entire measurement calculated in microns, not metres and mm.
I could be wrong. It has happened. In true pedant mode, I do recall once making a mistake in 1968....![]()
You need to distinguish between units and prefixes.
A meter, kilometer, micrometer, centimeter are all units of length with the same SI units used. The prefixes merely add or subtract zeros or decimal places for convenience.
The unit for a meter in SI or metric notation for example can be changed to say imperial units of inches.
Inches and meters are both measurements of length but are differents units
Microns/micrometer, centimeter, meter, mm are the same units distinguished by prefixes










