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| {{refimprove|date=July 2009}} | |||
| ] | |||
| A '''microsecond''' is an ] of time equal to one ] (0.000001 or 10<sup>−6</sup> or {{frac|1|1,000,000}}) of a ]. Its symbol is '''μs'''. | |||
| A microsecond is equal to 1000 ]s or {{frac|1|1,000}} of a ]. Because the next ] is 1000 times larger, measurements of 10<sup>−5</sup> and 10<sup>−4</sup> seconds are typically expressed as tens or hundreds of microseconds. | |||
| ==Examples== | |||
| * 1 microsecond (1 ]s) – cycle time for ] 1{{hsp}}×{{hsp}}10<sup>6</sup> ] (1 MHz), the inverse unit. This corresponds to radio wavelength ] ] (AM ] band), as can be calculated by multiplying 1 µs by the ] (approximately 3.00{{hsp}}×{{hsp}}10<sup>8</sup> m/s) to determine the distance travelled. | |||
| * 1 microsecond – the length of time of a high-speed, commercial ] flash (see ]). | |||
| * 1.8 microseconds – the amount of time subtracted from the ] as a result of the ]. | |||
| * 2 microseconds – the lifetime of a ] particle | |||
| * 2.68 microseconds – the amount of time subtracted from the Earth’s day as a result of the ].<ref name="IndianOceanNASA">{{cite web | url=http://www.jpl.nasa.gov/news/news.cfm?release=2005-009 | title=NASA Details Earthquake Effects on the Earth | publisher=NASA | date=January 10, 2005 | accessdate=June 29, 2011 | author=Buis, Alan}}</ref> | |||
| * 3.33564095 microseconds – the time taken by ] to travel one ] in a vacuum | |||
| * 5.4 microseconds – the time taken by light to travel one ] in a ] (or radio waves point-to-point in a near vacuum) | |||
| * 8.01 microseconds – the time taken by light to travel one mile in typical ] | |||
| * 10 microseconds (μs) – cycle time for frequency ], radio wavelength ] ] | |||
| * 18 microseconds – net amount per year that the length of the day lengthens, largely due to ].<ref>{{Cite news|url=http://www.sciencealert.com/astronomers-find-a-day-on-earth-is-getting-longer-each-century|title=Earth's Days Are Getting 2 Milliseconds Longer Every 100 Years|last=MacDonald|first=Fiona|work=ScienceAlert|access-date=2017-03-08|language=en-gb}}</ref> | |||
| * 20.8 microseconds – ] interval for digital audio with 48,000 samples/s | |||
| * 22.7 microseconds – ] interval for ] audio (44,100 samples/s) | |||
| * 38 microseconds – discrepancy in ] ] time per day (compensated by clock speed) due to ]{{hsp}}<ref>{{cite web | url=http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html | title= GPS and Relativity | accessdate=2011-10-01 | author= Richard Pogge }}</ref> | |||
| * 50 microseconds – cycle time for highest ] tone (20 kHz) | |||
| * 50 microseconds to read – the access latency for a modern solid state drive which holds non-volatile computer data<ref></ref> | |||
| *100 microseconds (0.1 ms) – cycle time for frequency ] | |||
| *125 microseconds – sampling interval for telephone audio (8000 samples/s) | |||
| *164 microseconds – half-life of ]-214 | |||
| *240 microseconds – ] of ]-277 | |||
| *250 microseconds – cycle time for highest tone in ] audio (4 kHz){{Citation needed|date=May 2011}} | |||
| * 277.8 microseconds – a fourth (a 60th of a 60th of a second), used in astronomical calculations by ] and ] in 1000 and 1267 AD, respectively.<ref>{{cite book | |||
| |author=al-Biruni | |||
| |author-link=al-Biruni | |||
| |translator=Sachau C Edward | |||
| |year=1879 | |||
| |title=The chronology of ancient nations: an English version of the Arabic text of the Athâr-ul-Bâkiya of Albîrûnî, or "Vestiges of the Past" | |||
| |url=https://books.google.com/books?id=pFIEAAAAIAAJ&pg=PA148&vq=thirds|pages=147–149 | |||
| |publisher=] | |||
| |oclc=9986841 | |||
| }}</ref><ref> | |||
| {{cite book | |||
| |author=R Bacon | |||
| | authorlink= Roger Bacon | |||
| |others=translator: BR Belle | |||
| |year=2000 |origyear=1928 | |||
| |title= ] | |||
| |publisher=] | |||
| |page=table facing page 231 | |||
| |isbn=978-1-85506-856-8 | |||
| |nopp=true | |||
| }}</ref> | |||
| * 489.67 microseconds – time for light at a 1550 nm frequency to travel 100 km in a singlemode fiber optic cable (where speed of light is approximately 200 million meters per second due to its ]). | |||
| *The average human eye ] takes 350,000 microseconds (just over 1/3 of one second). | |||
| *The average human finger ] takes 150,000 microseconds (just over 1/7 of one second). | |||
| *A ] illuminates for 1000 microseconds. | |||
| *Standard camera ] opens the shutter for 4000 microseconds or 4 milliseconds. | |||
| ==See also== | |||
| * ] | |||
| * ] | |||
| * ] | |||
| * ] | |||
| * ] | |||
| ==References== | |||
| {{Reflist}} | |||
| ==External links== | |||
| * | |||
| {{Orders of magnitude seconds}} | |||
| {{DEFAULTSORT:1 E-6 S}} | |||
| ] | |||
| ] | |||