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To help compare different orders of magnitude this page lists lengths between 10 nm and 100 nm (10-8 and 10-7 m). See also lengths of other orders of magnitude. Distances shorter than 10 nm 20 nm -- thickness of bacterial flagellum 40 nm -- extreme ultraviolet wavelength 90 nm -- Human immunodeficiency virus (HIV) (generally, viruses range in size from 20 nm to 450 nm) 100 nm -- 90% of the particles of wood smoke are smaller than 100 nm Distances longer than 100 nm External link Conversion Calculator for Units of LENGTH (http://www.ex.ac.uk/cimt/dictunit/ccleng.htm)