The speed of light in vacuum provides a convenient universal relationship between distance and time, so in physics (particularly in quantum physics) and often in chemistry, a jiffy is defined as the time taken for light to travel some specified distance.

The term ‘jiffy’ has branched out to mean different time values in other fields than it does in physics and chemistry. In computer science, for instance, what a jiffy precisely defines time-wise is tied to timer interrupts, defined as “the duration of one tick of a timer interrupt”.

Jiffy 是一个非正式术语，表示不具体的非常短暂的时间段，如“我一会儿就回来”。 首次使用于1785年，词源不明，有迹象表明是来自描述闪电的 thieves' cant （ 英语 ： thieves' cant ） [ 1 ] 。

在电子学中，一个jiffy是交流电供电周期的时间,大多数家用电源的一秒的1/60 或1/50。 在计算机领域，一个 jiffy最初是指系统计时器中断的两个ticks之间的时间，并不是一个绝对固定的时间，同计时器中断的时间长短相关联。

2024年8月14日 · A jiffy is a scientific unit of time, defined as the time light takes to travel one centimeter in a vacuum. In scientific contexts, a jiffy equals approximately 33.3564 picoseconds. The term was popularized by American physical chemist Gilbert Newton Lewis …

In electronics, a jiffy is the time between alternating current power cycles (1/60 or 1/50 of a second). In computing, a jiffy was originally the time between two ticks of the system timer interrupt. The term "jiffy" is sometimes used in computer animation as a method of defining playback rate, with the delay interval between individual frames ...

6 天之前 · In these fields, a ‘jiffy’ is defined as the time it takes for light to travel one fermi , approximately the size of a nucleon , in a vacuum. This translates to a duration incredibly brief even by scientific standards – approximately 3 x 10^-23 seconds.

2024年5月16日 · Surprisingly, a "jiffy" is a real unit of time, equal to how long it takes for light to travel one femtometer, which is one quadrillionth of a meter. In other words, it's really, really brief: A single second contains three hundred thousand billion billion jiffys.

2021年5月24日 · A jiffy is a measure of time. Sometime in the 18th Century, a jiffy was slang for ‘lightning’. In the 20th Century, American chemist, Gilbert Lewis proposed the jiffy should be the time it takes for light to travel one centimeter.

Take control of your work time. Jiffy is a time tracker designed for streamlined work time tracking, allowing you to spend a minimum amount of time, but at the same time generate an accurate time report. Jiffy’s beauty is in its simplicity, it’s like having a stopwatch on your phone or tablet for all the jobs that you need to track.