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Nanosecond
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<h2 id="common-measurements">Common measurements</h2> <ul><li>0.001 nanoseconds – one <a href="/facts/Picosecond/62W8DK3Q">picosecond</a></li> <li>0.96 nanoseconds – <a href="/facts/100_Gigabit_Ethernet/DRV0aeNu">100 Gigabit Ethernet</a> <a href="/facts/Interpacket_gap/7BU21IKz">Interpacket gap</a></li> <li>96 nanoseconds – <a href="/facts/Gigabit_Ethernet/1ItIoV2w">Gigabit Ethernet</a> <a href="/facts/Interpacket_gap/7BU21IKz">Interpacket gap</a></li> <li>1.0 nanosecond – cycle time of an electromagnetic wave with a <a href="/facts/Frequency/QUSbPaW8">frequency</a> of 1 GHz (109 <a href="/facts/Hertz/6Wshj5qm">hertz</a>).</li> <li>1.0 nanosecond – electromagnetic <a href="/facts/Wavelength/kcJU0ymz">wavelength</a> of 1 <a href="/facts/Light-nanosecond/8ythm6t7">light-nanosecond</a>. Equivalent to 0.3 m radio band.</li> <li>1.016703362164 nanoseconds (by <a href="/facts/International_yard_and_pound/awSvK9or">definition</a>) – time taken by light to travel 1 <a href="/facts/International_yard_and_pound/awSvK9or">foot</a> in vacuum.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a></li> <li>3.3356409519815 nanoseconds (by <a href="/facts/Metre/hPhzc1CV">definition</a>) – time taken by <a href="/facts/Light/jeofpMn4">light</a> to travel 1 <a href="/facts/Metre/hPhzc1CV">metre</a> in vacuum.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a></li> <li>8 nanoseconds – typical <a href="/facts/Propagation_delay/tUcrAwwe">propagation delay</a> of <a href="/facts/7400-series_integrated_circuits/mDqHhWyc">74HC series logic chips</a> based on <a href="/facts/HCMOS/GUjK6S7Q">HCMOS</a> technology, commonly used for digital electronics in the mid-1980s.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a></li> <li>10 nanoseconds – one "<a href="/facts/Shake_(time)/r5Jf885q">shake</a>", (as in a "shake of a lamb's tail") approximate time of one generation of a nuclear chain reaction with fast neutrons</li> <li>10 nanoseconds – cycle time for frequency 100 MHz (108 <a href="/facts/Hertz/6Wshj5qm">hertz</a>), radio wavelength 3 <a href="/facts/Metre/hPhzc1CV">m</a> (<a href="/facts/Radiotelephone/MuDe82Uh">VHF</a>, <a href="/facts/FM_band/524k5ptB">FM band</a>)</li> <li>10 nanoseconds – half-life of <a href="/facts/Lithium-12/XC311sQu">lithium-12</a></li> <li>12 nanoseconds – mean lifetime of a charged <a href="/facts/K_meson/Yn2w4QlQ">K meson</a><a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a></li> <li>20–40 nanoseconds – time of fusion reaction in a <a href="/facts/Hydrogen_bomb/T9zFe3H0">hydrogen bomb</a></li> <li>30 nanoseconds – half-life of <a href="/facts/Carbon-21/K1LfqDNj">carbon-21</a></li> <li>77 nanoseconds – a sixth (a 60th of a 60th of a 60th of a 60th of a second)</li> <li>100 nanoseconds – cycle time for <a href="/facts/Frequency/QUSbPaW8">frequency</a> 10 MHz, radio wavelength <a href="/facts/1_E1_m/YzL1bHGX">30 m</a> (<a href="/facts/Shortwave/7cIaClcB">shortwave</a>)</li> <li>294.4 nanoseconds – half-life of <a href="/facts/Polonium-212/bIdUTjCm">polonium-212</a><a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a></li> <li>333 nanoseconds – cycle time of highest <a href="/facts/Medium_wave/ojp67drU">medium wave</a> radio frequency, 3 MHz</li> <li>500 nanoseconds – T1 time of Josephson <a href="/facts/Phase_qubit/Kp2Rc1y5">phase qubit</a> (see also <i><a href="/facts/Qubit/WveeEubw">Qubit</a></i>) as of May 2005</li> <li>1000 nanoseconds – one <a href="/facts/Microsecond/zdW1DEb2">microsecond</a></li> <li>1 nanosecond – time precision in <a href="/facts/Go_(programming_language)/oWlsmAFJ">Go</a><a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a><a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a><a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a></li></ul> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/International_System_of_Units/S7YLglNz">International System of Units</a></li> <li><a href="/facts/Jiffy_(time)/focGz617">Jiffy (time)</a></li> <li><a href="/facts/Microsecond/zdW1DEb2">Microsecond</a></li> <li><a href="/facts/Millisecond/xHCyv235">Millisecond</a></li> <li><a href="/facts/Orders_of_magnitude_(time)/bEovB6Tp">Orders of magnitude (time)</a></li> <li><a href="/facts/Picosecond/62W8DK3Q">Picosecond</a></li> <li><a href="/facts/Second/jtFxnJXx">Second</a></li></ul> Notes Citations <h2 id="external-links">External links</h2> <ul><li><a href="https://www.youtube.com/watch?v=9eyFDBPk4Yw">Visual representation of a nanosecond</a> <a href="/facts/Grace_Hopper/MEhbGazn">Grace Hopper</a> explains the nanosecond</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>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. <a href="/wiki/International_yard" target="_blank">/wiki/International_yard</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"Official BIPM definition of the metre". BIPM. Archived from the original on 2003-10-29. Retrieved 2008-09-22. <a href="https://web.archive.org/web/20031029003927/http://www.bipm.org/en/si/si_brochure/chapter2/2-1/metre.html" target="_blank">https://web.archive.org/web/20031029003927/http://www.bipm.org/en/si/si_brochure/chapter2/2-1/metre.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Philips Semiconductors. "74HC-T-U-User-Guide" (PDF). Archived (PDF) from the original on 2022-10-09. <a href="https://www.digikey.fr/htmldatasheets/production/1428461/0/0/1/.pdf" target="_blank">https://www.digikey.fr/htmldatasheets/production/1428461/0/0/1/.pdf</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Beringer, J. "K±" (PDF). pdg.lbl.gov. <a href="http://pdg.lbl.gov/2012/listings/rpp2012-list-K-plus-minus.pdf" target="_blank">http://pdg.lbl.gov/2012/listings/rpp2012-list-K-plus-minus.pdf</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>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. <a href="https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf" target="_blank">https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>"time package - time - Go Packages". pkg.go.dev. Retrieved 2025-01-29. <a href="https://pkg.go.dev/time#Duration.Nanoseconds" target="_blank">https://pkg.go.dev/time#Duration.Nanoseconds</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"It's Go Time on Linux". The Cloudflare Blog. Archived from the original on 2024-10-05. Retrieved 2025-01-29. time.Now() now gets real nanosecond resolution on supported systems <a href="http://web.archive.org/web/20241005060209/https://blog.cloudflare.com/its-go-time-on-linux/" target="_blank">http://web.archive.org/web/20241005060209/https://blog.cloudflare.com/its-go-time-on-linux/</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>"Comprehensive Guide to Dates and Times in Go". Boot.dev Blog. 2021-05-17. Retrieved 2025-01-29. The default time.Time type represents an instant in time with nanosecond precision <a href="https://blog.boot.dev/golang/golang-date-time/#overview---how-dates-and-times-are-stored-in-go" target="_blank">https://blog.boot.dev/golang/golang-date-time/#overview---how-dates-and-times-are-stored-in-go</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> </ol>