Jiffy [2]
Jiffy [2] :
A unit of time used in chemistry and physics, equal to a "light centimeter," that is, the time required for light to travel a distance of one centimeter. This is a very brief interval indeed, about 33.3564 picoseconds. This definition of the jiffy was proposed by the American physical chemist Gilbert N. Lewis (1875-1946), who was one of the first to apply principles of quantum physics in chemistry. More recently, some physicists have defined the jiffy as the time required for light to travel a distance of one femtometer (fermi); this would make the jiffy equal to 3.335 64 zeptoseconds
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