Thought for the month

“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.

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