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this post was submitted on 28 May 2024
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How did the first guy manage to measure his height to within 100 microns?
Really accurate tape measure.
Lasers and shit
woah
If you can stand very still I could do it here at work.
To be fair, mm scale lines are a thing and its pretty standard to estimate the last digit between lines on a measurement.
You'd still need demarcation down to .1 mm. Your eyes are going to struggle to guess which line you're supposed to with, much less estimate last, unmarried 0.01 mm. 100 μm is about the width of a hair. 10 μ, well, good luck.
Regardless, such a precise measurement is meaningless when it comes to height, because there's a lot of uncontrolled variables that will change you height for any given measurement.
Instrument uncertainty will be a very small part of total uncertainty there for sure.
He used an inch tape measure and converted the height to cm I guess.
He's European
https://en.m.wikipedia.org/wiki/Vernier_scale