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Johannes Stark Biography

Johannes Stark (German pronunciation: [joˈhanəs ʃtaʁk], 15 April 1874 – 21 June 1957) was a German physicist and Physics Nobel Prize laureate. He is known for identifying the Stark effect. He was later closely involved with the Deutsche Physik movement under the Nazi regime.

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Johannes Stark Quotes

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.

Atoms, Deal, Done, Lead, Material, May

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.

Atom, Atoms, Fundamental, Fundamentals, Mean, Surface

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.

Atoms, Characteristic, Come, Familiar, Light, Wave

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.

Atoms, Structure, Chemicals, Likely, Know, Solar

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.

Experience, Rays, Atoms, Strikes, Electron, Learnt

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.

Lines, Longer, Numbers, Running, Series, Wavelength

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.

Atom, Atoms, Direction, External, Negative, Positive

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.

Moving, Rays, Owing, Electric, Hydrogen, Luminous

The question of the composition of perceptible objects is one which already occupied the mind of the ancient Greeks.

Ancient, Composition, Greek, Greeks, Mind, Occupied

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.

Atomic, Phenomena, Problem, Scientist, Scientists, Structure

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.

Discovery, Establishment, Facts, Light, Size

The emitters of the spectral series are without exception single atoms, not compounds of atoms.

Atoms, Compounds, Exception, Series

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.

Individuality, Doe, Different, Atoms, Consist