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Encyclopedia :
F :
FE :
FEM :
Femtosecond |
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FemtosecondA femtosecond is the SI unit of time equal to 10-15 of a second.The word femtosecond is formed by the prefix femto and the unit second. Its symbol is fs. The waves of visible light oscillate with a period of about 1 femtosecond. For a list of times on the order of 1-10 femtoseconds, compare 1 E-15 s. See also
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