Microsecond: Difference between revisions

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{{short description|One millionth of a second}}
{{short description|One millionth of a second}}
{{Infobox unit
{{Infobox unit
| name    = microsecond
| name    = microsecond
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| inunits1 = {{val|e=-6|ul=s}}
| inunits1 = {{val|e=-6|ul=s}}
}}
}}
A '''microsecond''' is a unit of [[time]] in the [[International System of Units]] (SI) equal to one [[millionth]] (0.000001 or 10<sup>−6</sup> or {{frac|1|1,000,000}}) of a [[second]]. Its symbol is '''μs''', sometimes simplified to '''us''' when [[Unicode]] is not available.
A '''microsecond''' is a unit of [[time]] in the [[International System of Units]] (SI) equal to one [[millionth]] (0.000001 or 10<sup>−6</sup> or {{frac|1|1,000,000}}) of a [[second]]. Its symbol is '''μs''', sometimes simplified to '''us''' when [[Unicode]] is not available.


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* 50 microseconds – cycle time for highest [[Hearing (sense)|human-audible]] tone (20&nbsp;kHz).
* 50 microseconds – cycle time for highest [[Hearing (sense)|human-audible]] tone (20&nbsp;kHz).
* 50 microseconds – to read the access latency for a modern solid state drive which holds non-volatile computer data.<ref>[http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-dc-s3500-spec.pdf Intel Solid State Drive Product Specification]</ref>
* 50 microseconds – to read the access latency for a modern solid state drive which holds non-volatile computer data.<ref>[http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-dc-s3500-spec.pdf Intel Solid State Drive Product Specification]</ref>
* 100 microseconds (0.1&nbsp;ms) – cycle time for frequency 10 kHz.
* 100 microseconds (0.1&nbsp;ms) – cycle time for frequency 10&nbsp;kHz.
* 125 microseconds – common sampling interval for telephone audio (8000 samples/s).<ref>{{Citation |last=Kumar |first=Anurag |title=Application Models and Performance Issues |date=2008 |url=https://linkinghub.elsevier.com/retrieve/pii/B9780123742544500041 |work=Wireless Networking |pages=53–79 |publisher=Elsevier |language=en |doi=10.1016/b978-012374254-4.50004-1 |isbn=978-0-12-374254-4 |access-date=2022-08-08 |last2=Manjunath |first2=D. |last3=Kuri |first3=Joy|url-access=subscription }}</ref>
* 125 microseconds – common sampling interval for telephone audio (8000 samples/s).<ref>{{Citation |last=Kumar |first=Anurag |chapter=Application Models and Performance Issues |date=2008 |chapter-url=https://linkinghub.elsevier.com/retrieve/pii/B9780123742544500041 |title=Wireless Networking |pages=53–79 |publisher=Elsevier |language=en |doi=10.1016/b978-012374254-4.50004-1 |isbn=978-0-12-374254-4 |access-date=2022-08-08 |last2=Manjunath |first2=D. |last3=Kuri |first3=Joy|chapter-url-access=subscription }}</ref>
* 164 microseconds – [[half-life]] of [[polonium]]-214.
* 164 microseconds – [[half-life]] of [[polonium]]-214.
* 240 microseconds – half-life of [[copernicium]]-277.
* 240 microseconds – half-life of [[copernicium]]-277.
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* The average human eye [[blink]] takes 350,000 microseconds (just over {{frac|1|3}} second).
* The average human eye [[blink]] takes 350,000 microseconds (just over {{frac|1|3}} second).
* The average human finger [[Finger snapping|snap]] takes 150,000 microseconds (just over {{frac|1|7}} second).
* The average human finger [[Finger snapping|snap]] takes 150,000 microseconds (just over {{frac|1|7}} second).
* A [[Flash (photography)|camera flash]] illuminates for 1,000 microseconds.
* A [[Flash (photography)|camera flash]] illuminates for 1,000 microseconds or 1 millisecond.
* Standard camera [[shutter speed]] opens the shutter for 4,000 microseconds or 4 milliseconds.
* Standard camera [[shutter speed]] opens the shutter for 4,000 microseconds or 4 milliseconds.
* 584542 years of microseconds fit in 64 bits: (2**64)/(1e6*60*60*24*365.25).
* 584554 years of microseconds fit in 64 bits: (2**64)/(1e6*60*60*24*365.2425).


==See also==
==See also==

Latest revision as of 14:45, 18 June 2026

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A microsecond is a unit of time in the International System of Units (SI) equal to one millionth (0.000001 or 10−6 or <templatestyles src="Fraction/styles.css" />1⁄1,000,000) of a second. Its symbol is μs, sometimes simplified to us when Unicode is not available.

A microsecond is to one second, as one second is to approximately 11.57 days.

A microsecond is equal to 1000 nanoseconds or <templatestyles src="Fraction/styles.css" />1⁄1,000 of a millisecond. Because the next SI prefix is 1000 times larger, measurements of 10−5 and 10−4 seconds are typically expressed as tens or hundreds of microseconds.

Examples

  • 1 microsecond (1 μs) – cycle time for frequency Script error: No such module "val". (1 MHz), the inverse unit. This corresponds to radio wavelength 300 m (AM medium wave band), as can be calculated by multiplying 1 μs by the speed of light (approximately Script error: No such module "val".).
  • 1 microsecond – the length of time of a high-speed, commercial strobe light flash (see air-gap flash).
  • 1 microsecond – protein folding takes place on the order of microseconds (thus this is the speed of carbon-based life).
  • 1.8 microseconds – the amount of time subtracted from the Earth's day as a result of the 2011 Japanese earthquake.[1]
  • 2 microseconds – the lifetime of a muonium particle.
  • 2.68 microseconds – the amount of time subtracted from the Earth's day as a result of the 2004 Indian Ocean earthquake.[2]
  • 3.33564095 microseconds – the time taken by light to travel one kilometre in a vacuum.
  • 5.4 microseconds – the time taken by light to travel one mile in a vacuum (or radio waves point-to-point in a near vacuum).
  • 8 microseconds – the time taken by light to travel one mile in typical single-mode fiber optic cable.
  • 10 microseconds (μs) – cycle time for frequency 100 kHz, radio wavelength 3 km.
  • 18 microseconds – net amount per year that the length of the day lengthens, largely due to tidal acceleration.[3]
  • 20.8 microseconds – sampling interval for digital audio with 48,000 samples/s.
  • 22.7 microseconds – sampling interval for CD audio (44,100 samples/s).
  • 38 microseconds – discrepancy in GPS satellite time per day (compensated by clock speed) due to relativity
  1. REDIRECT Template:Hair space

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  • 50 microseconds – cycle time for highest human-audible tone (20 kHz).
  • 50 microseconds – to read the access latency for a modern solid state drive which holds non-volatile computer data.[5]
  • 100 microseconds (0.1 ms) – cycle time for frequency 10 kHz.
  • 125 microseconds – common sampling interval for telephone audio (8000 samples/s).[6]
  • 164 microseconds – half-life of polonium-214.
  • 240 microseconds – half-life of copernicium-277.
  • 260 to 480 microseconds - return trip ICMP ping time, including operating system kernel TCP/IP processing and answer time, between two Gigabit Ethernet devices connected to the same local area network switch fabric.
  • 277.8 microseconds – a fourth (a 60th of a 60th of a second), used in astronomical calculations by al-Biruni and Roger Bacon in 1000 and 1267 AD, respectively.[7][8]
  • 490 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 metres per second due to its index of refraction).
  • The average human eye blink takes 350,000 microseconds (just over <templatestyles src="Fraction/styles.css" />1⁄3 second).
  • The average human finger snap takes 150,000 microseconds (just over <templatestyles src="Fraction/styles.css" />1⁄7 second).
  • A camera flash illuminates for 1,000 microseconds or 1 millisecond.
  • Standard camera shutter speed opens the shutter for 4,000 microseconds or 4 milliseconds.
  • 584554 years of microseconds fit in 64 bits: (2**64)/(1e6*60*60*24*365.2425).

See also

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "citation/CS1".
  5. ↑ Intel Solid State Drive Product Specification
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "citation/CS1".

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External links

Template:Orders of magnitude seconds

de:Sekunde#Abgeleitete Maßeinheiten

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