nanometre
Sign in to savethumb|330px|Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales. The nanometre is often used to express dimensions on an atomic scale and mostly in the molecular scale. The nanometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: nm), or nanometer (American spelling), is a unit of length in the International System of Units (SI), equal to one billionth (short scale) or one thousand millionth (long scale) of a metre (0.000000001 m) and to 1000 picometres. One nanometre can be exp
AI overview
A nanometre is a unit of length equal to one billionth of a metre, used to measure extremely small distances on the atomic and molecular scale. It matters because many natural structures—like atoms and molecules—are sized in nanometres, making it the practical measurement system for understanding and working with materials at these tiny scales.
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Key facts
- Unit.name
- nanometre
- Unit.image
- Chiraltube.png
- Unit.caption
- One nanometric carbon nanotube, photographed with scanning tunnelling microscope
- Unit.symbol
- nm
- Unit.standard
- SI
- Unit.quantity
- length
- Unit.units1
- SI units
- Unit.inunits1
-    
- Unit.units2
- Natural units
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- Unit.units3
- imperial/US units
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Article
6 sectionsContents
- History
- Etymology
- Usage
- Unicode
- References
- External links
thumb|330px|Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales. The nanometre is often used to express dimensions on an atomic scale and mostly in the molecular scale. The nanometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: nm), or nanometer (American spelling), is a unit of length in the International System of Units (SI), equal to one billionth (short scale) or one thousand millionth (long scale) of a metre (0.000000001 m) and to 1000 picometres. One nanometre can be expressed in scientific notation as 1 × 10−9 m and as m.
==History== The nanometre was formerly known as the "millimicrometre" – or, more commonly, the "millimicron" for short – since it is of a micrometre. It was often denoted by the symbol mμ or, more rarely, as μμ (however, μμ should refer to a millionth of a micron).