| SI units | |
|---|---|
| 1×10−9 m | 1×10−3 μm |
| US customary / Imperial units | |
| 3.281×10−9 ft | 39.37×10−9 in |
A nanometre (American spelling: nanometer; symbol nm) (Greek: νάνος, nanos, "dwarf"; μέτρον, metrοn, "unit of measurement") is a unit of length in the metric system, equal to one billionth of a meter.
It is one of the more often used units for very small lengths, and equals ten Ångström, an internationally recognised non-SI unit of length. It is often associated with the field of nanotechnology and the wavelength of light. Formerly, millimicron (symbol mµ) was used for the nanometre. The symbol µµ has also been used [1][2][3].
It is also the most common unit used to describe the manufacturing technology used in the semiconductor industry. It is the most common unit to describe the wavelength of light, with visible light falling in the region of 400–700 nm.
References
- ^ THE SVEDBERG and J. BURTON NICHOLS; “Determination of the size and distribution of size of particle by centrifugal methods”; Journal of the American Chemical Society; American Chemical Society, Washington, D.C.; December 1923; 45 (12): pp. 2910–2917.
- ^ THE SVEDBERG and HERMAN RINDE; “The ulta-centrifuge, a new instrument for the determination of size and distribution of size of particle in amicroscopic colloids”; Journal of the American Chemical Society; American Chemical Society, Washington, D.C.; December 1924; 46 (12): pp. 2677–2693.
- ^ KARL TERZAGHI; Erdbaumechanik auf bodenphysikalischer Grundlage; Franz Deuticke, Vienna, Austria / Leipzig, Germany; 1925 [Unaltered reproduction by G. Gistel & Cie., Vienna; 1976]; 399 pp. (page 32)
See also
- 1 E-9 m
- SI prefix
- Orders of magnitude (length)
- Conversion of units, for comparison with other units of length
- Micrometre an order of magnitude down 1/1,000,000 of a meter
- Nanotechnology
External links
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