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Definition.com

The Femtosecond is the interval between the traffic light changing to green and the person in the vehicle behind sounding their horn..

Definition.com

The Femtosecond is the time it takes for the smile to leave the face of an airline's chief flight attendant as he walks from Club Class to Economy Class..

Definition.com

A Femtosecond is a millionth of a billionth of a second... put in comparative terms, a femtosecond is to a second as a second is to 32 million years.

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