Definitions for "1 E-15 s"
To help compare orders of magnitude of different times this page lists times between 10−15 seconds and 10−12 seconds (1 femtosecond and 1 picosecond). A femtosecond is one billionth of one millionth of a second. For context, a femtosecond is to a second, what a second is to a hundred million years.