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A nanometre (American spelling: nanometer) is 1.0×10−9 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 (400 nm to 700 nm), ultraviolet radiation and gamma rays; amongst other things. 1 nm = 1000 picometre. In older (e.g. 1958) texts, the nm is sometimes denoted "mµ" for "millimicron", based on the old term "micron" for a micrometre. Double prefixes are not allowed in SI, and this is never seen in modern writing or speech. picometre << nanometre << micrometre See also
External links
ca:Nanòmetre de:Nanometer es:Nanómetro fr:Nanomètre it:Nanometro nl:Nanometer ja:ナノメートル pl:Nanometr sl:Nanometer zh:纳米 |
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