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| The image shows time on the x-axis and kinetic energy of the electrons on the y-axis; the number of electrons with a given energy is represented by colour (see panel at top right). The technique reveals that the longer pulse has a duration of 4.3 femtoseconds (4.3 X 10-15 s), which is in good agreement with measurement by established techniques (image credit: Ferenc Krausz et al.) |
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