how long is one nanosecond
A nanosecond (ns) is an SI unit of time equal to one billionth of a second (10â9 or 1/1,000,000,000 s). One nanosecond is to one second as one second is to 31.71 years. (Actually the correct answer [per leap years calculation] is one second is to 31.69 years, because there are 365.2422 days in a solar year). The word nanosecond is formed by the prefix nano and the unit second. Its symbol is ns.