Micrometre

  • micrometre
    cfaser haarrp.jpg
    a 6 μm diameter carbon filament above a 50 μm diameter human hair
    general information
    unit systemmetric
    unit oflength
    symbolμm 
    conversions
    1 μm in ...... is equal to ...
       si units   1×10−6 m
       natural units   6.1877×1028 p
    1.8897×104 a0
       imperial/us units   3.2808×10−6 ft
     3.9370×10−5 in

    the micrometre (international spelling as used by the international bureau of weights and measures;[1] si symbol: μm) or micrometer (american spelling), also commonly known by the previous deprecated name micron, is an si derived unit of length equalling 1×10−6 metre (si standard prefix "micro-" = 10−6); that is, one millionth of a metre (or one thousandth of a millimetre, 0.001 mm, or about 0.000039 inch).[1]

    the next smallest common si unit is the nanometer, equivalent to one one-thousandth of a micrometer, or one billionth of a metre (0.000000001 m).

    the micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria,[1] and for grading wool by the diameter of the fibres.[2] the width of a single human hair ranges from approximately 20 to 200 μm. the longest human chromosome is approximately 10 μm in length.

  • examples
  • si standardization
  • symbol
  • see also
  • notes and references
  • external links

Micrometre
Cfaser haarrp.jpg
A 6 μm diameter carbon filament above a 50 μm diameter human hair
General information
Unit systemmetric
Unit oflength
Symbolμm 
Conversions
1 μm in ...... is equal to ...
   SI units   1×10−6 m
   Natural units   6.1877×1028 P
1.8897×104 a0
   imperial/US units   3.2808×10−6 ft
 3.9370×10−5 in

The micrometre (international spelling as used by the International Bureau of Weights and Measures;[1] SI symbol: μm) or micrometer (American spelling), also commonly known by the previous deprecated name micron, is an SI derived unit of length equalling 1×10−6 metre (SI standard prefix "micro-" = 10−6); that is, one millionth of a metre (or one thousandth of a millimetre, 0.001 mm, or about 0.000039 inch).[1]

The next smallest common SI unit is the nanometer, equivalent to one one-thousandth of a micrometer, or one billionth of a metre (0.000000001 m).

The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria,[1] and for grading wool by the diameter of the fibres.[2] The width of a single human hair ranges from approximately 20 to 200 μm. The longest human chromosome is approximately 10 μm in length.