V2EX picosecond

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Picosecond

定义 Definition

picosecond（皮秒）：时间单位，等于 10 秒（一万亿分之一秒），常用于物理学、光学、电子学与超快激光等领域描述极短时间过程。

发音 Pronunciation

/pakosknd/

例句 Examples

A picosecond is one trillionth of a second.
皮秒是一万亿分之一秒。

In ultrafast spectroscopy, reactions can be tracked on the picosecond timescale.
在超快光谱学中，反应过程可以在皮秒时间尺度上被追踪。

词源 Etymology

pico- 来自国际单位制前缀，表示 10，源自意大利语 piccolo（“小的”）；second 源自拉丁语传统时间分法（“第二个”分割单位）。合起来字面意思就是“非常小的秒”。

相关词 Related Words

文学与作品 Notable Works

A Brief History of Time Stephen Hawking（科普语境中涉及极短时间尺度的讨论）
QED: The Strange Theory of Light and Matter Richard P. Feynman（与光和物质相互作用相关的时间尺度语境中常出现此类单位）
The Feynman Lectures on Physics Richard P. Feynman（物理教学文本中常用科学计量单位，包括皮秒等）

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