An attosecond (abbreviated as as) is a unit of time in the International System of Units (SI) equal to 10−18 or 1⁄1 000 000 000 000 000 000 (one quintillionth) of a second. An attosecond is to a second, as a second is to approximately 31.69 billion years.
An attosecond (abbreviated as as) is a unit of time in the International System of Units (SI) equal to 10−18 or 1⁄1 000 000 000 000 000 000 (one quintillionth) of a second. An attosecond is to a second, as a second is to approximately 31.69 billion years.
Source: Wikipedia "Attosecond" · CC BY-SA 4.0
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