Johannes Stark
Johannes Stark
Johannes Starkwas a German physicist and Physics Nobel Prize laureate, who was closely involved with the Deutsche Physik movement under the Nazi regime...
ProfessionPhysicist
Date of Birth15 April 1874
years mind atoms
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.
experience rays atoms
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.
atoms compounds exception
The emitters of the spectral series are without exception single atoms, not compounds of atoms.
atoms century structure
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.
discovery atoms facts
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.
views atoms lines
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.
atoms done may
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.
light atoms wave
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.
positive negative atoms
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.
atomic higher lower
The spectra of atomic ions of higher valence are different from the spectra of atomic ions of the same element, but of lower valence.
chemical elements positive seemed series thus
Thus at the beginning of 1906 it seemed to be established that the emitters of the spectral series of chemical elements are their positive atomic ions.
came canal cases containing effect later light lines positive rays
However, cases came to light later in which canal rays containing only positive ions showed a Doppler effect in the spectral lines emitted by them.
individuality doe different
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.
moving ions axes
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.