The tricky (and uncertain!) business of measuring particles. Professor Michael Merrifield from the University of Nottingham. Part Two: http://youtu.be/aKR0ADUhjNE Uncertainty: http://youtu.be/D1yb1adU2vI Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/#!/periodicvideos This project features scientists from The University of Nottingham http://www.nottingham.ac.uk/physics/index.aspx Sixty Symbols videos by Brady Haran A run-down of Brady's channels: http://bit.ly/bradychannels