Encyclopedia > Order of magnitude - length

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Order of magnitude - length

  • 10-35 m - Lengths smaller than this do not make any physical sense. See Planck length
  • 10-15 m - Size of atomic nucleus
  • 10-10 m - Size of atoms - See Ångström
  • 10-9 m = 1 nanometer (nm) - Diameter of DNA helix
  • 10-8 m = 10 nm
  • 10-7 m = 100 nm
  • 10-6 m = 1 micrometer aka micron (μm)
  • 10-5 m = 10 μm
    • 10 μm -- Width of cotton fibre
    • 80 μm -- width of human hair
  • 10-4 m = 100 μm
    • 125 μm -- Dust mite
  • 10-3 m = 1 millimeter (mm)
    • 2.54 mm -- distance between pins in old DIP[?] (dual-in-pair) electronic components
  • 10-2 m = 1 centimeter (cm)
    • 1.5 cm -- length of an average mosquito.
    • 2.54 cm -- 1 inch
  • 10-1 m = 10 cm
  • 1 m
    • 1.7 m -- average person's height(?)
  • 10 m
  • 100 m
  • 1,000 m = 1 kilometer (km)
  • 10,000 m = 10 km
  • 100,000 m = 100 km
  • 106 m = 1,000 km
  • 107 m = 10,000 km
    • 12,756 km = Diameter of the earth
  • 108 m = 100,000 km
    • 384,000 km -- Moon's orbital distance from Earth
  • 109 m
    • 1,390,000 km -- Diameter of Sun
  • 1011 m
    • 149,597,870,691 m -- Mean distance between Earth and Sun. Definition: Astronomical unit
  • 1012 m
    • 1,429,400,000 km -- Orbital distance of Saturn from Sun
    • 5,913,520,000 km -- Orbital distance of Pluto from Sun
  • 1015 m
    • 9.5 x 1015m -- 1 light year; Distance travelled by light in one year
    • 4 x 1016m -- Distance to nearest star (Proxima Centauri)
  • 1021 m
  • 10 26 m
    • 10 billion light years -- Estimated distance to Quasars - the farthest observed objects in the Universe



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