Nanosecond: Difference between revisions
Content deleted Content added
m ? |
some cleanup |
||
| (3 intermediate revisions by one other user not shown) | |||
| Line 11: | Line 11: | ||
}} |
}} |
||
{{wiktionary|nanosecond}} |
{{wiktionary|nanosecond}} |
||
A '''nanosecond''' ('''ns''') is a unit of [[time]] in the [[International System of Units]] (SI) equal to one billionth of a [[second]], that is, {{ |
A '''nanosecond''' ('''ns''') is a unit of [[time]] in the [[International System of Units]] (SI) equal to one billionth of a [[second]], that is, {{sfrac|1|{{val|1000000000}}}} of a second, or {{val|e=−9}} seconds. |
||
The term combines the [[SI prefix]] ''[[nano-]]'' indicating a 1 billionth submultiple of an SI unit (e.g. nanogram, [[nanometre]], etc.) and ''second'', the primary unit of time in the SI. |
The term combines the [[SI prefix]] ''[[nano-]]'' indicating a 1 billionth submultiple of an SI unit (e.g. nanogram, [[nanometre]], etc.) and ''second'', the primary unit of time in the SI. |
||
A nanosecond is equal to 1000 [[picosecond]]s or {{ |
A nanosecond is to one second, as one second is to approximately 31.69 years. |
||
A nanosecond is equal to 1000 [[picosecond]]s or {{sfrac|1|1000}} [[microsecond]]. Time units ranging between 10{{sup|−8}} and 10{{sup|−7}} seconds are typically expressed as tens or hundreds of nanoseconds. |
|||
Time units of this granularity are commonly found in [[telecommunications]], pulsed [[laser]]s, and related aspects of [[electronics]]. |
Time units of this granularity are commonly found in [[telecommunications]], pulsed [[laser]]s, and related aspects of [[electronics]]. |
||
| Line 22: | Line 24: | ||
* 0.001 nanoseconds – one [[picosecond]] |
* 0.001 nanoseconds – one [[picosecond]] |
||
* 0.96 nanoseconds – [[100 Gigabit Ethernet]] [[Interpacket gap]] |
* 0.96 nanoseconds – [[100 Gigabit Ethernet]] [[Interpacket gap]] |
||
* 1.0 nanosecond – cycle time of an electromagnetic wave with a [[frequency]] of 1 GHz ( |
* 1.0 nanosecond – cycle time of an electromagnetic wave with a [[frequency]] of 1 GHz ({{val|e=9|u=[[hertz]]}}). |
||
* 1.0 nanosecond – electromagnetic [[wavelength]] of 1 [[light-nanosecond]]. Equivalent to 0. |
* 1.0 nanosecond – electromagnetic [[wavelength]] of 1 [[light-nanosecond]]. Equivalent to 0.3 m radio band. |
||
* {{#expr:(1000000000/299792458)*(0.9144/3)}} nanoseconds (by [[International yard and pound|definition]]) – time taken by light to travel 1 [[International yard and pound|foot]] in |
* {{val|{{#expr:(1000000000/299792458)*(0.9144/3)}}}} nanoseconds (by [[International yard and pound|definition]]) – time taken by light to travel 1 [[International yard and pound|foot]] in vacuum.<ref group="n">By definition of the "foot" as exactly 1/3 yards, and of the [[international yard]] as "exactly 0.9144 metres", and of the metre (SI unit) defined by the [[International Bureau of Weights and Measures]] as the "length of the path traveled by light in vacuum during a time interval of 1/{{val|299792458}} of a second". The time taken by light to travel 1 foot in vacuum is therefore (1/299792458) × (0.9144/3) seconds, or {{val|{{#expr:(1000000000/299792458)*(0.9144/3)}}}} nanoseconds.</ref> |
||
* {{#expr:1000000000/299792458}} nanoseconds (by [[Metre#Speed of light definition|definition]]) – time taken by [[light]] to travel 1 [[metre]] in |
* {{val|{{#expr:1000000000/299792458}}}} nanoseconds (by [[Metre#Speed of light definition|definition]]) – time taken by [[light]] to travel 1 [[metre]] in vacuum.<ref name="BIPM21"> |
||
{{cite web |
|||
|title=Official BIPM definition of the metre |
|title=Official BIPM definition of the metre |
||
|url=http://www.bipm.org/en/si/si_brochure/chapter2/2-1/metre.html |
|url=http://www.bipm.org/en/si/si_brochure/chapter2/2-1/metre.html |
||
| Line 33: | Line 36: | ||
|archive-date=2003-10-29 |
|archive-date=2003-10-29 |
||
|url-status=dead |
|url-status=dead |
||
}}</ref> |
|||
* 8 nanoseconds |
* 8 nanoseconds – typical [[propagation delay]] of [[7400-series integrated circuits|74HC series logic chips]] based on [[HCMOS]] technology, commonly used for digital electronics in the mid-1980s.<ref>{{cite web|title=74HC-T-U-User-Guide|author=Philips Semiconductors|url=https://www.digikey.fr/htmldatasheets/production/1428461/0/0/1/.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.digikey.fr/htmldatasheets/production/1428461/0/0/1/.pdf |archive-date=2022-10-09 |url-status=live}}</ref> |
||
* 10 nanoseconds – one "[[shake (time)|shake]]", (as in a "shake of a lamb's tail") approximate time of one generation of a nuclear chain reaction with fast neutrons |
* 10 nanoseconds – one "[[shake (time)|shake]]", (as in a "shake of a lamb's tail") approximate time of one generation of a nuclear chain reaction with fast neutrons |
||
* 10 nanoseconds – cycle time for frequency 100 MHz ( |
* 10 nanoseconds – cycle time for frequency 100 MHz ({{val|e=8|u=[[hertz]]}}), radio wavelength 3 [[metre|m]] ([[Radiotelephone|VHF]], [[FM band]]) |
||
* 10 nanoseconds – half-life of [[lithium-12]] |
* 10 nanoseconds – half-life of [[lithium-12]] |
||
* 12 nanoseconds – mean lifetime of a charged [[K meson]]<ref>{{cite web |last=Beringer |first=J. |title=K{{sup|±}} |url=http://pdg.lbl.gov/2012/listings/rpp2012-list-K-plus-minus.pdf |website=pdg.lbl.gov}}</ref> |
* 12 nanoseconds – mean lifetime of a charged [[K meson]]<ref>{{cite web |last=Beringer |first=J. |title=K{{sup|±}} |url=http://pdg.lbl.gov/2012/listings/rpp2012-list-K-plus-minus.pdf |website=pdg.lbl.gov}}</ref> |
||
| Line 46: | Line 49: | ||
* 294.4 nanoseconds – half-life of [[polonium-212]]{{NUBASE2020|ref}} |
* 294.4 nanoseconds – half-life of [[polonium-212]]{{NUBASE2020|ref}} |
||
* 333 nanoseconds – cycle time of highest [[medium wave]] radio frequency, 3 MHz |
* 333 nanoseconds – cycle time of highest [[medium wave]] radio frequency, 3 MHz |
||
* 500 nanoseconds – T1 time of Josephson [[phase qubit]] (see also [[Qubit]]) as of May 2005 |
* 500 nanoseconds – T1 time of Josephson [[phase qubit]] (see also ''[[Qubit]]'') as of May 2005 |
||
* 1,000 nanoseconds – one [[microsecond]] |
* {{val|1,000}} nanoseconds – one [[microsecond]] |
||
== See also == |
== See also == |
||
| Line 59: | Line 62: | ||
== References == |
== References == |
||
;Notes |
; Notes : |
||
{{reflist|group="n"}} |
{{reflist|group="n"}} |
||
;Citations |
; Citations : |
||
{{reflist|1}} |
{{reflist|1}} |
||
==External links== |
== External links == |
||
*[https://www.youtube.com/watch?v=9eyFDBPk4Yw Visual representation of a nanosecond] [[Grace Hopper]] explains the nanosecond |
* [https://www.youtube.com/watch?v=9eyFDBPk4Yw Visual representation of a nanosecond] [[Grace Hopper]] explains the nanosecond |
||
{{Orders of magnitude seconds}} |
{{Orders of magnitude seconds}} |
||
Latest revision as of 22:57, 28 October 2024
| nanosecond | |
|---|---|
| Unit system | SI |
| Unit of | time |
| Symbol | ns |
| Conversions | |
| 1 ns in ... | ... is equal to ... |
| SI units | 10−9 s |
Look up nanosecond in Wiktionary, the free dictionary.
A nanosecond (ns) is a unit of time in the International System of Units (SI) equal to one billionth of a second, that is, 1/1000000000 of a second, or 10−9 seconds.
The term combines the SI prefix nano- indicating a 1 billionth submultiple of an SI unit (e.g. nanogram, nanometre, etc.) and second, the primary unit of time in the SI.
A nanosecond is to one second, as one second is to approximately 31.69 years.
A nanosecond is equal to 1000 picoseconds or 1/1000 microsecond. Time units ranging between 10−8 and 10−7 seconds are typically expressed as tens or hundreds of nanoseconds.
Time units of this granularity are commonly found in telecommunications, pulsed lasers, and related aspects of electronics.
Common measurements
[edit]- 0.001 nanoseconds – one picosecond
- 0.96 nanoseconds – 100 Gigabit Ethernet Interpacket gap
- 1.0 nanosecond – cycle time of an electromagnetic wave with a frequency of 1 GHz (109 hertz).
- 1.0 nanosecond – electromagnetic wavelength of 1 light-nanosecond. Equivalent to 0.3 m radio band.
- 1.016703362164 nanoseconds (by definition) – time taken by light to travel 1 foot in vacuum.[n 1]
- 3.3356409519815 nanoseconds (by definition) – time taken by light to travel 1 metre in vacuum.[1]
- 8 nanoseconds – typical propagation delay of 74HC series logic chips based on HCMOS technology, commonly used for digital electronics in the mid-1980s.[2]
- 10 nanoseconds – one "shake", (as in a "shake of a lamb's tail") approximate time of one generation of a nuclear chain reaction with fast neutrons
- 10 nanoseconds – cycle time for frequency 100 MHz (108 hertz), radio wavelength 3 m (VHF, FM band)
- 10 nanoseconds – half-life of lithium-12
- 12 nanoseconds – mean lifetime of a charged K meson[3]
- 20–40 nanoseconds – time of fusion reaction in a hydrogen bomb
- 30 nanoseconds – half-life of carbon-21
- 77 nanoseconds – a sixth (a 60th of a 60th of a 60th of a 60th of a second)
- 96 nanoseconds – Gigabit Ethernet Interpacket gap
- 100 nanoseconds – cycle time for frequency 10 MHz, radio wavelength 30 m (shortwave)
- 294.4 nanoseconds – half-life of polonium-212[4]
- 333 nanoseconds – cycle time of highest medium wave radio frequency, 3 MHz
- 500 nanoseconds – T1 time of Josephson phase qubit (see also Qubit) as of May 2005
- 1000 nanoseconds – one microsecond
See also
[edit]- International System of Units
- Jiffy (time)
- Microsecond
- Millisecond
- Orders of magnitude (time)
- Picosecond
- Second
References
[edit]- Notes
- ^ By definition of the "foot" as exactly 1/3 yards, and of the international yard as "exactly 0.9144 metres", and of the metre (SI unit) defined by the International Bureau of Weights and Measures as the "length of the path traveled by light in vacuum during a time interval of 1/299792458 of a second". The time taken by light to travel 1 foot in vacuum is therefore (1/299792458) × (0.9144/3) seconds, or 1.016703362164 nanoseconds.
- Citations
- ^ "Official BIPM definition of the metre". BIPM. Archived from the original on 2003-10-29. Retrieved 2008-09-22.
- ^ Philips Semiconductors. "74HC-T-U-User-Guide" (PDF). Archived (PDF) from the original on 2022-10-09.
- ^ Beringer, J. "K±" (PDF). pdg.lbl.gov.
- ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
External links
[edit]- Visual representation of a nanosecond Grace Hopper explains the nanosecond