Johannes Stark Professions : Physicist Born : April 15, 1874 Died : June 21, 1957 Browse All Authors Top 22 quotes by Johannes Stark 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 taken humanity steps An external electric field, meeting it and passing through it, affects the negative as much as the positive quanta of the atom, and pushes the former to one side, and the latter in the other direction. Johannes Stark atoms positive negative 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 light discovery facts 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 wave light If the experimental physicist has already done a great deal of work in this field, nevertheless the theoretical physicist has still hardly begun to evaluate the experimental material which may lead him to conclusions about the structure of the atom. Johannes Stark atoms fields done In my view the structure of the whole atom was that of an individual, with all its parts interconnected, and the emission of a spectral line appeared to me to be the result of the coherence and co-operation of several electric quanta. Johannes Stark coherence atoms views 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 scientist structure problem 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 atoms discovery facts The most common and most important result of them is that the nature and size of the effect on corresponding series of different elements are largely an expression of the peculiarity of their atomic structure - or, at least, of the structure of the surface. Johannes Stark size important expression The question of the composition of perceptible objects is one which already occupied the mind of the ancient Greeks. Johannes Stark ancient greek mind 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 atoms chemicals structure The emitters of the spectral series are without exception single atoms, not compounds of atoms. Johannes Stark compounds atoms exception 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 atoms fundamentals mean The movement of the emitters of the spectral lines may be deduced on the basis of the Doppler principle. Johannes Stark lines movement principles 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 owing rays moving Along a series of lines running from longer to shorter wavelengths the effect of the electric field becomes greater as the serial numbers increase - that is, as the wavelength decreases. Johannes Stark lines running numbers 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 atoms ions giving We can in fact first place the beam of rays of moving positive atomic ions in a plane perpendicular to the axis in which we see the spectral lines emitted by them. Johannes Stark axes ions moving Moreover, the abundance of chemical compounds and their importance in daily life hindered the chemist from investigating the question, in what does the individuality of the atoms of different elements consist. Johannes Stark individuality different doe We have learnt through experience that when an electrical ray strikes the surface of an atom, an electron, and in some circumstances a second and even a third electron, can be detached. Johannes Stark atoms rays experience Similar Authors Gabriel Lippmann physicist Burton Richter physicist Bruno Rossi physicist Bruce Maccabee physicist Brian Cox physicist Allan McLeod Cormack physicist All Authors
