Thought for the month

“Do not be so open minded that your brains fall out.” Walter Kotschnig, Austrian born US administrator (1901-85).

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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