Microsecond


Microsecond

A microsecond is an SI unit of time equal to one millionth (10−6) of a second. Its symbol is µs.

A microsecond is equal to 1000 nanoseconds or 1/1000 millisecond. Because the next SI unit is 1000 times larger, measurements of 10−5 and 10−4 seconds are typically expressed as tens or hundreds of microseconds.

Contents

Examples

  • 1 microsecond (1 μs) – cycle time for frequency 1 x 106 hertz (1 MHz), the inverse unit. This corresponds to radio wavelength 300 m (AM mediumwave band), as can be calculated by multiplying 1 µs by the speed of light (approximately 3×108 m/s) to determine the distance travelled.
  • 1 microsecond – the length of time of a high-speed, commercial strobe light flash.
  • 1.8 microseconds - the amount of time subtracted from the Earth's day as a result of the 2011 Japanese earthquake.
  • 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.[1]
  • 3.33564095 microseconds – the time taken by light to travel one kilometer in a vacuum
  • 4.63 microseconds – a fifth (a 60th of a 60th of a 60th of a second)
  • 5.4 microseconds – the time taken by light to travel one mile in a vacuum
  • 10 microseconds (μs) – cycle time for frequency 100 kHz, radio wavelength 3 km
  • 17 microseconds: net amount per year that the length of the day lengthens, largely due to tidal acceleration.[citation needed]
  • 20.8 microseconds – sampling interval for digital audio with 48000 samples/s
  • 22.7 microseconds – sampling interval for CD audio (44100 samples/s)
  • 38 microseconds – discrepancy in GPS satellite time per day (compensated by clock speed) due to relativity[2]
  • 50 microseconds – cycle time for highest human-audible tone (20 kHz)
  • 100 microseconds (0.1 ms) – cycle time for frequency 10 kHz
  • 125 microseconds – sampling interval for telephone audio (8000 samples/s)
  • 240 microseconds – half-life of copernicium-277
  • 250 microseconds – cycle time for highest tone in telephone audio (4 kHz)[citation needed]
  • 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.[3][4]

For reference

  • The average human eye blink takes 350,000 microseconds.
  • A camera flash illuminates for 1,000 microseconds.
  • Standard camera shutter speed opens the shutter for 4,000 microseconds or 4 milliseconds.

See also

References

External links


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Look at other dictionaries:

  • microsecond — (n.) 1906, from MICRO (Cf. micro ) + SECOND (Cf. second) (n.) …   Etymology dictionary

  • microsecond — ► NOUN ▪ one millionth of a second …   English terms dictionary

  • microsecond — [mī′krō sek΄ənd] n. [ MICRO + SECOND3] one millionth of a second: symbol, μs …   English World dictionary

  • microsecond — UK [ˈmaɪkrəʊˌsekənd] / US [ˈmaɪkroʊˌsekənd] noun [countable] Word forms microsecond : singular microsecond plural microseconds a unit for measuring time. There are one million microseconds in a second …   English dictionary

  • microsecond — [[t]ma͟ɪkroʊsekənd[/t]] microseconds N COUNT A microsecond is one millionth of a second …   English dictionary

  • microsecond — mikrosekundė statusas T sritis Standartizacija ir metrologija apibrėžtis Dalinis trukmės matavimo vienetas, lygus milijonajai sekundės daliai, t. y. 1 μs =10⁻⁶ s. atitikmenys: angl. microsecond vok. Mikrosekunde, f rus. микросекунда, f pranc.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • microsecond — mikrosekundė statusas T sritis fizika atitikmenys: angl. microsecond vok. Mikrosekunde, f rus. микросекунда, f pranc. microseconde, f …   Fizikos terminų žodynas

  • microsecond — mikrosekundė statusas T sritis informatika apibrėžtis Tarptautinės matavimo vienetų sistemos (SI) laiko matavimo vienetas, lygus vienai milijonajai (10⁻⁶ ) sekundės daliai. Santrumpa µs. santrumpa( os) µs atitikmenys: angl. microsecond …   Enciklopedinis kompiuterijos žodynas

  • microsecond — n. one millionth of a second. * * * microsecond, section see micro 5 a, 2 c …   Useful english dictionary

  • microsecond — noun Etymology: International Scientific Vocabulary Date: 1906 one millionth of a second …   New Collegiate Dictionary


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