Thought for the month

“I like to listen. I have learned a great deal from listening carefully. Most people never listen.” Ernest Hemmingway, Author (1899 – 1961).

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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