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, 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 equal to 1000 picoseconds or 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. 0.001 nanoseconds – one picosecond 0.5 nanoseconds – the half-life of beryllium-13. 0.96 nanoseconds – 100 Gigabit Ethernet Interpacket gap 1.0 nanosecond – cycle time of an electromagnetic wave with a frequency of 1 GHz (1 hertz). 1.0 nanosecond – electromagnetic wavelength of 1 light-nanosecond. Equivalent to 0.3m radio band. nanoseconds (by definition) – time taken by light to travel 1 foot in a vacuum. nanoseconds (by definition) – time taken by light to travel 1 metre in a vacuum. 8 nanoseconds - typical propagation delay of 74HC series logic chips based on HCMOS technology, commonly used for digital electronics in the mid-1980s. 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 (1 hertz), radio wavelength 3 m (VHF, FM band) 10 nanoseconds – half-life of lithium-12 12 nanoseconds – mean lifetime of a charged K meson 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) 299 nanoseconds – half-life of polonium-212 333 nanoseconds – cycle time of highest medium wave radio frequency, 3 MHz 500 nanoseconds