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[-] Geometrinen_Gepardi@sopuli.xyz 70 points 14 hours ago

When sharpening knives, with practice you can tell when you are done by sliding your fingertips along (not across) the sharpened bevel. It's possible to feel imperfections measured in micrometers this way.

[-] danekrae@lemmy.world 19 points 13 hours ago

We have equipment to measure down to microns, and my students often test how fine details they can feel.

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this post was submitted on 15 Nov 2024
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