Moontanman Posted April 28, 2009 Report Posted April 28, 2009 At The Limits Of The Photoelectric Effect ScienceDaily (Apr. 27, 2009) — By way of the classical photoeffect, Einstein proved in 1905 that light also has particle characteristics. However, with extremely high light intensities, remarkable things happen in the process. Scientists of the Physikalisch-Technische Bundesanstalt (PTB) have found this out with colleagues at FLASH in Hamburg, the first free-electron laser (FEL) for soft X-rays worldwide. The current models based on Einstein's idea are simply described in such a way: A photon knocks an external electron out of an atom, provided that the photon energy is high enough. At The Limits Of The Photoelectric Effect Quote
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