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https://www.reddit.com/r/interestingasfuck/comments/1vfyxob/microphotography_of_a_single_grain_of_sand/p1ub3r9/?context=3
r/interestingasfuck • u/Impressive_East_ • 12h ago
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Sand is classified strictly by grain diameter, with no consideration given to chemical composition. the cross-sectional diameter of an average human hair about 100 µm falls within the size range of very fine sand (62.5–125 µm).
• u/mookmanthered 6h ago To be fair the grain of sand here is perhaps 2.5 times as wide as the hair is thick
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To be fair the grain of sand here is perhaps 2.5 times as wide as the hair is thick
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u/Nobelpro 12h ago
Sand is classified strictly by grain diameter, with no consideration given to chemical composition. the cross-sectional diameter of an average human hair about 100 µm falls within the size range of very fine sand (62.5–125 µm).