Thought for the month

“Contradiction is not a sign of falsity, nor the lack of contradiction the sign of truth.” Blaise Pascal, French mathematician and physicist (1623 – 62).

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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