1 yoctometre
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To help compare different orders of magnitude this page lists lengths shorter than 10−23 m (10 ym).
This series on orders of magnitude does not have a range of shorter distances
- 1.6 × 10−35 metres = the Planck length (lengths smaller than this do not make any physical sense, according to current theories of physics)
- 1 ym = 1 yoctometre, the smallest named subdivision of the metre in the SI base unit of length.