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Einstein received the Nobel Prize for explaining the photoelectric effect — that, simply put, a single atom is irradiated with light.
Einstein believed that light consists of photons that transfer only quantized energy to the electron of an atom. If the photon’s energy is sufficient, it knocks the electrons out of the atom. But what happens to the photon’s momentum in this process? To answer the question, physicists at Goethe University constructed a new, high-resolution spectrometer called super COLTRIMS because it further advances the COLTRIMS principle invented at the university. COLTRIMS, an acronym for COLd Target Recoil Ion Momentum Spectroscopy, consists of ionizing individual atoms and then precisely…READ MORE