Chemist eugene goldstein biography channel

German physicist

Eugen Goldstein (OY-gən, German:[ˈɔʏɡeːnˈɡɔlt.ʃtaɪn,ˈɔʏɡn̩-]; 5 September &#; 25 December ) was a German physicist. He was an early investigator of discharge tubes, the discoverer of anode rays or canal rays, later identified as positive ions in the gas phase including the hydrogen ion.^[1][2] He was the great uncle of the violinists Mikhail Goldstein and Boris Goldstein.

Life

Goldstein was born in at Gleiwitz Upper Silesia, now known as Gliwice, Poland, to a Jewish family.

Goldstein studied at the University of Berlin now Humboldt University of Berlintaking his doctorate in He then went on to the University of Berlin now Humboldt University of Berlintaking his doctorate in Goldstein worked at the Berlin Observatory from to but spent most of his career at the Potsdam, where he became head of the astrophysical section in His first scientific paper was published inhis last over fifty years later.

He studied at Breslau and later, under Helmholtz, in Berlin. Goldstein worked at the Berlin Observatory from to but spent most of his career at the Potsdam Observatory, where he became head of the astrophysical section in He died in and was buried in the Weißensee Cemetery in Berlin.

Work

In the mid-nineteenth century, Julius Plücker investigated the light emitted in discharge tubes (Crookes tubes) and the influence of magnetic fields on the glow. Later, in , Johann Wilhelm Hittorf studied discharge tubes with energy rays extending from a negative electrode, the cathode.

He was an preliminary investigator of discharge tubes, the discoverer of anode rays or canal rays, later identified as positive ions in the gas phase including the hydrogen ion. He studied at Breslau and later, under Helmholtzin Berlin. Goldstein worked at the Berlin Observatory from to but spent most of his career at the Potsdam Observatory, where he became head of the astrophysical section in Later, inJohann Wilhelm Hittorf studied discharge tubes with fire rays extending from a negative electrodethe cathode.

These rays produced a fluorescence when they strike a tube's glass walls, and when interrupted by a firm object they cast a shadow.

In the s, Goldstein undertook his own investigations of discharge tubes and named the clear emissions studied by others Kathodenstrahlen, or cathode rays.^[3] He discovered several important properties of cathode rays, which contributed to their later identification as the first subatomic particle, the electron.

He found that cathode rays were emitted perpendicularly from a metal surface, and carried energy. He attempted to measure their velocity by the Doppler shift of spectral lines in the glow emitted by Crookes tubes.

Eugene Goldstien By:Rishi Narayan. I studied at the University of Breslau. I spent most of my career at the Potsdam Observatory. My main interest was electrical discharges in vacuums.

In , he discovered that tubes with a perforated cathode also exhale a glow at the cathode end. Goldstein concluded that in addition to the already-known cathode rays, later recognized as electrons moving from the negatively charged cathode toward the positively charged anode, there is another ray that travels in the antonym direction.

Because these latter rays passed through the holes, or channels, in the cathode, Goldstein called them Kanalstrahlen, or canal rays. They are composed of positive ions whose identity depends on the residual gas inside the tube.

It was another of Helmholtz's students, Wilhelm Wien, who later conducted extensive studies of canal rays, and in time this work would get part of the basis for mass spectrometry.

The anode ray with the largest e/m ratio comes from hydrogen gas (H₂), and is made of H⁺ ions.

In other words, this ray is made of protons.

Chemistry - Atomic Scientists Flashcards - Quizlet: Eugen Goldstein (born Sept. 5, , Gleiwitz, Prussia—died Dec. 25, , Berlin) was a German physicist known for his work on electrical phenomena in gases and on cathode rays; he is also credited with discovering canal rays.

Goldstein's work with anode rays of H⁺ was apparently the first observation of the proton, although strictly speaking it might be argued that it was Wien who measured the e/m ratio of the proton and should be credited with its revelation.

Goldstein also used discharge tubes to investigate comets. An argue against, such as a small ball of glass or iron, placed in the path of cathode rays produces secondary emissions to the sides, flaring outwards in a manner reminiscent of a comet's tail.

See the function of Hedenus for pictures and additional information.^[4]

Notes and references

Further reading