this post was submitted on 15 Nov 2024
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Science Memes

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[โ€“] Geometrinen_Gepardi@sopuli.xyz 78 points 16 hours ago (13 children)

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.

[โ€“] danekrae@lemmy.world 20 points 15 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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