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MICROMETER  (READ EASILY) हिन्दी  ! LEARN AND GROW
MICROMETER (READ EASILY) हिन्दी ! LEARN AND GROW
Published: 2016/12/21
Channel: LEARN AND GROW
Reading a Standard Micrometer.mp4
Reading a Standard Micrometer.mp4
Published: 2010/07/31
Channel: motoprof1441
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
Reading a Vernier Caliper and a Micrometer
Reading a Vernier Caliper and a Micrometer
Published: 2012/10/24
Channel: hanoverhighindians
How to Use a Micrometer
How to Use a Micrometer
Published: 2014/07/28
Channel: SMUPhysics
Micrometer Basics:  Use, Care and Calibration
Micrometer Basics: Use, Care and Calibration
Published: 2015/09/02
Channel: Keith Rucker - VintageMachinery.org
(: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
Dial Caliper, Vernier Caliper and Micrometer Tutorial
Dial Caliper, Vernier Caliper and Micrometer Tutorial
Published: 2014/04/17
Channel: WWU Engineering and Design
Micrometer Calibration 12-8-14
Micrometer Calibration 12-8-14
Published: 2014/12/08
Channel: Shane Conley
How to - Read an Inch Micrometer
How to - Read an Inch Micrometer
Published: 2014/09/23
Channel: lsstarrett
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
HD - Ensuring Micrometer Accuracy
HD - Ensuring Micrometer Accuracy
Published: 2012/05/07
Channel: lsstarrett
How to Read an Inch Micrometer.wmv
How to Read an Inch Micrometer.wmv
Published: 2011/01/28
Channel: etprof
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
How To Read Micrometers
How To Read Micrometers
Published: 2011/03/03
Channel: The Tool and Die Guy
Micrometre
Micrometre
Published: 2014/07/23
Channel: Audiopedia
Physics  Practical Class XII  Measure the Diameter using a Screw Gauge Part 1
Physics Practical Class XII Measure the Diameter using a Screw Gauge Part 1
Published: 2015/05/11
Channel: Edusat Haryana
Reading a Metric Micrometer.mp4
Reading a Metric Micrometer.mp4
Published: 2010/08/01
Channel: motoprof1441
Micrometer in hindi Mechanical engineering in hindi
Micrometer in hindi Mechanical engineering in hindi
Published: 2017/06/09
Channel: Mechanical Engineering in hindi
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
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
Calibrating and Reading an Inch Micrometer Caliper
Calibrating and Reading an Inch Micrometer Caliper
Published: 2011/05/19
Channel: machiningmoments
Micrometer Screw Gauge - Taking Reading | Physics | Myhometuition.com
Micrometer Screw Gauge - Taking Reading | Physics | Myhometuition.com
Published: 2014/07/14
Channel: myhometuition
A Micrometre Transferred to Everyday Life
A Micrometre Transferred to Everyday Life
Published: 2015/08/10
Channel: MitutoyoEuropeGmbH
Micrometer
Micrometer
Published: 2013/06/29
Channel: elearning softtech
Depth Micrometer Function and Reading
Depth Micrometer Function and Reading
Published: 2011/05/24
Channel: machiningmoments
SHOP TIPS #302 Calibrating a Fowler Micrometer tubalcain
SHOP TIPS #302 Calibrating a Fowler Micrometer tubalcain
Published: 2016/05/07
Channel: mrpete222
Floating Micrometer Measuring
Floating Micrometer Measuring
Published: 2010/02/04
Channel: drewdevitt
How to measure with an inside micrometer
How to measure with an inside micrometer
Published: 2015/07/14
Channel: SuburbanTool Inc
Convert Micrometer to Nanometer (un to nm) - Formula, Example, Solution
Convert Micrometer to Nanometer (un to nm) - 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
Easy way to repair and calibrate micrometers
Easy way to repair and calibrate micrometers
Published: 2016/09/23
Channel: Joe Schueler
Work with dial inside micrometre for checking bore accuracy
Work with dial inside micrometre for checking bore accuracy
Published: 2012/03/31
Channel: FactoryDragon87
Types of Micrometers
Types of Micrometers
Published: 2011/09/08
Channel: machiningmoments
LEAST COUNT  OF METRIC OUTSIDE MICROMETER
LEAST COUNT OF METRIC OUTSIDE MICROMETER
Published: 2013/03/10
Channel: FITTER E LEARNING 9867241975
Micrometer Carriage Stop, Final Assembly and Demonstration
Micrometer Carriage Stop, Final Assembly and Demonstration
Published: 2014/03/03
Channel: Toms Techniques
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
SPI 3 points inside Micrometer, How to use a Holetest type to measure inside diameters
SPI 3 points inside Micrometer, How to use a Holetest type to measure inside diameters
Published: 2017/03/03
Channel: Pierre's Garage
How to read a metric, mm micrometer
How to read a metric, mm micrometer
Published: 2016/02/19
Channel: FrankHurtAuto
Autonomous Digital Micrometre
Autonomous Digital Micrometre
Published: 2014/06/15
Channel: Shi Eric
Reloading Essentials: RCBS Ball Micrometer
Reloading Essentials: RCBS Ball Micrometer
Published: 2016/08/03
Channel: gavintoobe
The Inside Micrometer Video
The Inside Micrometer Video
Published: 2012/09/21
Channel: Grant Logsdon
Understand micrometer screw gauge
Understand micrometer screw gauge
Published: 2014/10/27
Channel: Pearson India
Reading a Metric Micrometer Caliper
Reading a Metric Micrometer Caliper
Published: 2011/05/19
Channel: machiningmoments
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
How to read the Micrometer Screw Gauge
How to read the Micrometer Screw Gauge
Published: 2012/06/06
Channel: ohmingyeo
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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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