“Four hostile newspapers are more to be feared than a thousand bayonets.” Attributed to Napoleon Bonaparte, Statesman (1769-1821).
Friday, 16 December 2016
What is a zeptosecond - not a lot!
A team in Germany have measured helium photoionization with zeptosecond precision. This is
the greatest accuracy of time determination ever achieved, as well as the first
absolute determination of the timescale of photoionization.