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A nanometre ( American spelling: nanometer) is 10−9 metres—or one billionth of a metre.Its symbol is nm.
It is an SI measure of length, commonly used in measuring the wavelengths of visible light, ultraviolet radiation and gamma rays; amongst other things.
1 nm = 1000 picometre.
1000 nm = 1 micrometre ( or 1 micron)
In older (e.g. 1958) texts, the nm is sometimes denoted "mµ" for "millimicron", based on the old term "micron" for a micrometre. This is never seen in modern writing or speech.
picometre << nanometre << micrometre
1 See also
2 External links
SI derived units of length
