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Johannes Stark

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The question of the composition of perceptible objects is one which already occupied the mind of the ancient Greeks. - Johannes Stark
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By allowing the positive ions to pass through an electric field and thus giving them a certain velocity, it is possible to distinguish them from the neutral, stationary atoms. - Johannes Stark
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The discovery of various phenomena has led to a recognition of the fact that the chemical atom is an individual which again is itself made up of several units into a selfcontained whole. - Johannes Stark
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For under certain conditions the chemical atoms emit light waves of a specific length or oscillation frequency - their familiar characteristic spectra - and these can come in the form of electromagnetic waves only from accelerated electric quanta. - Johannes Stark
#Atoms
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By recognizing that the chemical atom is composed of single separable electric quanta, humanity has taken a great step forward in the investigation of the natural world. - Johannes Stark
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At the head of these new discoveries and insights comes the establishment of the facts that electricity is composed of discrete particles of equal size, or quanta, and that light is an electromagnetic wave motion. - Johannes Stark
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It is more likely that more than a century will pass before we know the structure of the chemical atoms as thoroughly as we do our solar system. - Johannes Stark
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Many scientists will have to contribute to the solution of the great problem; they will have to follow up and measure all those phenomena in which the atomic structure is directly expressed. - Johannes Stark
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With this in mind, for some twenty years I have set myself as my particular task the experimental investigation of the connexion between change in the structure and change in the spectra of chemical atoms. - Johannes Stark
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A beam of luminous hydrogen canal rays has, owing to its velocity, exactly the same direction as that of the electric field in which it may be made to move. - Johannes Stark
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The removal of an electron from the surface of an atom - that is, the ionization of the atom - means a fundamental structural change in its surface layer. - Johannes Stark
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#Surface
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