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Reading a Standard Micrometer.mp4
Reading a Standard Micrometer.mp4
Published: 2010/07/31
Channel: motoprof1441
MICROMETER  (READ EASILY) हिन्दी  ! LEARN AND GROW
MICROMETER (READ EASILY) हिन्दी ! LEARN AND GROW
Published: 2016/12/21
Channel: LEARN AND GROW
How to Read a Metric Micrometer by WeldNotes.com
How to Read a Metric Micrometer by WeldNotes.com
Published: 2014/03/31
Channel: WeldNotes.com
Usinage - Mesurer au micromètre
Usinage - Mesurer au micromètre
Published: 2013/03/27
Channel: AfpaWebTv
Lecture on Micrometer [in Hindi]
Lecture on Micrometer [in Hindi]
Published: 2016/10/18
Channel: jalees ahmed
How to Use a Micrometer
How to Use a Micrometer
Published: 2014/07/28
Channel: SMUPhysics
How to Read an Inch Micrometer.wmv
How to Read an Inch Micrometer.wmv
Published: 2011/01/28
Channel: etprof
How to - Read an Inch Micrometer
How to - Read an Inch Micrometer
Published: 2014/09/23
Channel: lsstarrett
(:UnBox & Review:) iGaging EZMic Digital Micrometer ~Absolute Origin, .00005" Resolution
(:UnBox & Review:) iGaging EZMic Digital Micrometer ~Absolute Origin, .00005" Resolution
Published: 2014/02/06
Channel: GadgetClass
Calibrating and Reading an Inch Micrometer Caliper
Calibrating and Reading an Inch Micrometer Caliper
Published: 2011/05/19
Channel: machiningmoments
Reading a Metric Micrometer.mp4
Reading a Metric Micrometer.mp4
Published: 2010/08/01
Channel: motoprof1441
11 How to use a tubular inside micrometre
11 How to use a tubular inside micrometre
Published: 2016/09/27
Channel: Interspeech
How to use a Micrometer -  Introduction & Terminology - H Roberts and Sons
How to use a Micrometer - Introduction & Terminology - H Roberts and Sons
Published: 2014/05/21
Channel: HRobertsAndSons
Dial Caliper, Vernier Caliper and Micrometer Tutorial
Dial Caliper, Vernier Caliper and Micrometer Tutorial
Published: 2014/04/17
Channel: WWU Engineering and Design
Reading a Vernier Caliper and a Micrometer
Reading a Vernier Caliper and a Micrometer
Published: 2012/10/24
Channel: hanoverhighindians
HD - Ensuring Micrometer Accuracy
HD - Ensuring Micrometer Accuracy
Published: 2012/05/07
Channel: lsstarrett
Micrometer Screw Gauge - Taking Reading | Physics | Myhometuition.com
Micrometer Screw Gauge - Taking Reading | Physics | Myhometuition.com
Published: 2014/07/14
Channel: myhometuition
Types of Micrometers
Types of Micrometers
Published: 2011/09/08
Channel: machiningmoments
How to measure with an inside micrometer
How to measure with an inside micrometer
Published: 2015/07/14
Channel: SuburbanTool Inc
How to Read a Micrometer (Inches and mm.)
How to Read a Micrometer (Inches and mm.)
Published: 2014/09/13
Channel: Brandon Craft
Micrometer
Micrometer
Published: 2013/06/29
Channel: elearning softtech
Micrometer Calibration 12-8-14
Micrometer Calibration 12-8-14
Published: 2014/12/08
Channel: Shane Conley
How To Read Micrometers
How To Read Micrometers
Published: 2011/03/03
Channel: The Tool and Die Guy
Inside Micrometer
Inside Micrometer
Published: 2011/06/15
Channel: machiningmoments
Micrometre Meaning
Micrometre Meaning
Published: 2015/04/13
Channel: SDictionary
A Micrometre Transferred to Everyday Life
A Micrometre Transferred to Everyday Life
Published: 2015/08/10
Channel: MitutoyoEuropeGmbH
WOW... 😲 Convert Milimeter to MicroMeter (mm to micro m) - Formula, Example, Convertion Factor
WOW... 😲 Convert Milimeter to MicroMeter (mm to micro m) - Formula, Example, Convertion Factor
Published: 2016/01/19
Channel: How Convert
Easy way to repair and calibrate micrometers
Easy way to repair and calibrate micrometers
Published: 2016/09/23
Channel: Joe Schueler
HD - How to Use a Depth Micrometer
HD - How to Use a Depth Micrometer
Published: 2011/09/16
Channel: lsstarrett
Digital Micrometer Use from Mitutoyo
Digital Micrometer Use from Mitutoyo
Published: 2016/11/11
Channel: MitutoyoAmerica
Micrometer Basics:  Use, Care and Calibration
Micrometer Basics: Use, Care and Calibration
Published: 2015/09/02
Channel: Keith Rucker - VintageMachinery.org
Vernier caliper and Micrometer
Vernier caliper and Micrometer
Published: 2012/11/03
Channel: MechanicsTips
How To Read Standard and Vernier Micrometers
How To Read Standard and Vernier Micrometers
Published: 2015/03/19
Channel: MegaDepot
SHOP TIPS #302 Calibrating a Fowler Micrometer tubalcain
SHOP TIPS #302 Calibrating a Fowler Micrometer tubalcain
Published: 2016/05/07
Channel: mrpete222
Micrometer use and calibration
Micrometer use and calibration
Published: 2011/12/25
Channel: Grant Logsdon
How to read a Micrometer Screw gauge
How to read a Micrometer Screw gauge
Published: 2014/04/26
Channel: Tay Han Tseng Clement
How to Read the Micrometer, a Novel Approach that Makes Cents
How to Read the Micrometer, a Novel Approach that Makes Cents
Published: 2013/07/17
Channel: Toms Techniques
Read a metric micrometer
Read a metric micrometer
Published: 2014/09/02
Channel: apprenticemath
Machine Shop Basics:  Depth Micrometer Use and Calibration
Machine Shop Basics: Depth Micrometer Use and Calibration
Published: 2016/06/13
Channel: Keith Rucker - VintageMachinery.org
How to Read Metric Micrometer
How to Read Metric Micrometer
Published: 2016/08/29
Channel: UH Physics Laboratory
Micrometer in hindi Mechanical engineering in hindi
Micrometer in hindi Mechanical engineering in hindi
Published: 2017/06/09
Channel: Mechanical Engineering in hindi
DIY: Reading a Vernier Micrometer (Imperial)
DIY: Reading a Vernier Micrometer (Imperial)
Published: 2014/08/22
Channel: 4DIYers
Least Count (Part-2): How to find least count of micrometer Screw Gauge, IIT-JEE physics classes
Least Count (Part-2): How to find least count of micrometer Screw Gauge, IIT-JEE physics classes
Published: 2016/04/30
Channel: IIT-JEE Physics Classes
Mitutoyo VS Harbor Freight ....The Digital Micrometer show down
Mitutoyo VS Harbor Freight ....The Digital Micrometer show down
Published: 2015/12/11
Channel: Build Something Cool
52-219-091 EZ-Read Digit Thread Micrometer
52-219-091 EZ-Read Digit Thread Micrometer
Published: 2016/08/01
Channel: FowlerVid
LEAST COUNT OF MICROMETER
LEAST COUNT OF MICROMETER
Published: 2017/05/14
Channel: Industrial Tech
Depth Micrometer Function and Reading
Depth Micrometer Function and Reading
Published: 2011/05/24
Channel: machiningmoments
LEAST COUNT  OF METRIC OUTSIDE MICROMETER
LEAST COUNT OF METRIC OUTSIDE MICROMETER
Published: 2013/03/10
Channel: FITTER E LEARNING 9867241975
Convert Micrometer to Inch - Formula, Example, Solution
Convert Micrometer to Inch - Formula, Example, Solution
Published: 2016/09/19
Channel: How Convert
Calibrating a Mechanical Digital Micrometer.
Calibrating a Mechanical Digital Micrometer.
Published: 2013/07/12
Channel: Denis Renaud
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Micrometre
Cfaser haarrp.jpg
a 6 μm diameter carbon filament,
compared to 50 μm diameter human hair
Unit information
Unit system metric
Unit of length
Symbol μm 
Unit 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 as a micron, is an SI derived unit of length equaling 1×10−6 of a 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 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 10 to 200 μm. The first and longest human chromosome is approximately 10μm in length.

Examples[edit]

Between 1 μm and 10 μm:

Between 10 μm and 100 μm

  • 10 to 55 μm – width of wool fibre[5]
  • 17 to 181 μm – diameter of human hair [6]
  • 70 to 180 μm – thickness of paper

SI standardization[edit]

The term micron and the symbol μ were officially accepted for use in isolation to denote the micrometre in 1879, but officially revoked by the International System of Units (SI) in 1967.[7] This became necessary because the older usage was incompatible with the official adoption of the unit prefix micro-, denoted μ, during the creation of the SI in 1960. In the SI, the systematic name micrometre became the official name of the unit, and μm became the official unit symbol.

Nevertheless, in practice, "micron" remains a widely used term in preference to "micrometre" in many English-speaking countries, both in academic science (including geology, biology, physics, and astronomy) and in applied science and industry (including machining, the semiconductor industry, and plastics manufacturing).[citation needed] Additionally, in American English the use of "micron" helps differentiate the unit from the micrometer, a measuring device, because the unit's name in mainstream American spelling is a homograph of the device's name. In spoken English, they may be distinguished by pronunciation, as the name of the measuring device is invariably stressed on the second syllable, whereas the systematic pronunciation of the unit name, in accordance with the convention for pronouncing SI units in English, places the stress on the first syllable.

The plural of micron is normally "microns", though "micra" was occasionally used before 1950.[8][9][10]

Symbol[edit]

The official symbol for the SI prefix micro- is a Greek lowercase mu (μ).[11] In Unicode, there is also a micro sign with the codepoint U+00B5 (µ), distinct from the codepoint U+03BC (μ) of the Greek letter lowercase mu, so that machines can recognize it as the SI prefix symbol rather than as a letter. According to The Unicode Consortium, the Greek letter character is preferred,[12] but implementations must recognize the micro sign as well. Most fonts use the same glyph for the two characters.

See also[edit]

Notes and references[edit]

  1. ^ a b c "micrometre". Encyclopædia Britannica Online. Retrieved 18 May 2014. 
  2. ^ "Wool Fibre". "NSW Department of Education and Communities". Retrieved 18 May 2014. 
  3. ^ Smith, D.J. (2009). "Human sperm accumulation near surfaces: a simulation study" (PDF). Journal of Fluid Mechanics. 621: 295. doi:10.1017/S0022112008004953. Retrieved 20 May 2012. 
  4. ^ Gordon Ramel. "Spider Silk". Archived from the original on 4 December 2008. Retrieved 2008-12-04. garden spider silk has a diameter of about 0.003 mm ... Dragline silk (about .00032 inch (.008 mm) in Nephila) 
  5. ^ IST - Innovative Sintering Technologies Ltd. "Fibreshape applications". Retrieved 2008-12-04. Histogram of cotton thickness 
  6. ^ 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. 
  7. ^ BIPM - Resolution 7 of the 13th CGPM (1967/68), "Abrogation of earlier decisions (micron, new candle.)"
  8. ^ "Proceedings of the Royal Society of Queensland". google.com.br. 
  9. ^ "The Observer". google.com.br. 
  10. ^ [10 micra/10 microns https://books.google.com/ngrams/graph?content=10+micra%2F10+microns&year_start=1885&year_end=2000&corpus=15&smoothing=3&share=&direct_url=t1%3B%2C%2810%20micra%20/%2010%20microns%29%3B%2Cc0]
  11. ^ Prefixes of the International System of Units, International Bureau of Weights and Measures (page visited on 9 May 2016).
  12. ^ Unicode Technical Report #25

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