100 micrometres

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A clickable mosaic of objects
at scales within direct human experience, from the micrometric (106 m, top left) to the multi-kilometric (105 m, bottom right).

To help compare different orders of magnitude, this page lists lengths between 10−4 m and 10−3 m (100 µm and 1 mm).

Distances shorter than 100 µm

  • 100 µm – 1/10 of a millimetre
  • 100 µm – 0.00394 inches
  • 100 µm – average diameter of a strand of human hair[1]
  • 100 µm – thickness of a coat of paint
  • 100 µm – length of a dust particle
  • 110 µm – half way between the Planck scale and the diameter of the Observable universe,
        √(8.8×1026meters/1.6×10−35meters) × 1.6×10−35meters=110 µm
  • 120 µm – diameter of a human ovum
  • 170 µm – length of the largest sperm cell in nature, belonging to the Drosophila bifurca fruit fly[2][3]
  • 181 µm – maximum width of a strand of human hair[1]
  • 100–400 µm – length of Demodex mites living in human hair follicles
  • 200 µm – typical length of Paramecium caudatum, a ciliate protist
  • 250–300 µm – length of a dust mite[4]
  • 340 µm – length of a single pixel on a 17-inch monitor with a resolution of 1024×768
  • 500 µm – typical length of Amoeba proteus, an amoeboid protist
  • 500 µm – MEMS micro-engine[citation needed]
  • 560 µm - thickness of the central area of a human cornea[5]
  • 760 µm – thickness of an identification card

Distances longer than 1 mm

Notes[edit]

  1. ^ a b According to The Physics Factbook, the diameter of human hair ranges from 17 to 181 µm. Ley, Brian (1999). "Width of a Human Hair". The Physics Factbook. 
  2. ^ Kim Popiolek. "Dr. Charles Lindemann's Lab: Sperm Facts". Oakland University. 
  3. ^ Santoso, Alex (June 17, 2006). "World's Biggest Sperm Belongs to a Tiny Fly". Neatorama. 
  4. ^ House Dust Mites HYG-2157-97. Retrieved 2008-12-04
  5. ^ "Evaluation of corneal thickness and topography in normal eyes using the Orbscan corneal topography system". Br J Ophthalmol 83 (7): 774–8. July 1999. doi:10.1136/bjo.83.7.774. PMC 1723104. PMID 10381661.