Max Plank

Max Planck
Enlarge picture
Max Karl Ernst Ludwig Planck

Max Karl Ernst Ludwig Planck
BornMarch 23 1858(1858--)
Kiel, Germany
DiedSeptember 4 1947 (aged 89)
Göttingen, Germany
Residence Germany
Nationality German
FieldPhysicist
InstitutionsUniversity of Kiel
Humboldt-Universität zu Berlin
Georg-August-Universität Göttingen
Kaiser-Wilhelm-Gesellschaft
Alma materLudwig-Maximilians-Universität München
Academic advisor  Philipp von Jolly
Notable students   Gustav Ludwig Hertz
Erich Kretschmann
Walther Meißner
Walter Schottky
Max von Laue
Max Abraham
Moritz Schlick
Walther Bothe
Known forPlanck's constant, quantum theory
Notable prizes Nobel Prize in Physics (1918)
He is the father of Erwin Planck.
Quantum physics
Quantum mechanics
Introduction to...
Mathematical formulation of...
Fundamental concepts
Decoherence Interference
Uncertainty Exclusion
Transformation theory
Ehrenfest theorem Measurement
Experiments
Double-slit experiment
Davisson-Germer experiment
Stern–Gerlach experiment
EPR paradox Popper's experiment Schrdinger's cat
Equations
Schrdinger equation
Pauli equation
Klein-Gordon equation
Dirac equation
Advanced theories
Quantum field theory
Wightman axioms
Quantum electrodynamics
Quantum chromodynamics
Quantum gravity
Feynman diagram
Interpretations
Copenhagen Ensemble
Hidden variables Transactional
Many-worlds Consistent histories
Quantum logic
Consciousness causes collapse
Scientists
Planck Schrdinger
Heisenberg Bohr Pauli
Dirac Bohm Born
de Broglie von Neumann
Einstein Feynman
Everett Others
This box:     [ edit]
Max Karl Ernst Ludwig Planck (April 23 1858 in Kiel, GermanyOctober 4, 1947 in Göttingen, Germany) was a German physicist. He is considered to be the founder of quantum theory, and therefore one of the most important physicists of the twentieth century.

Life and work

Planck came from a traditional, intellectual family. His paternal great-grandfather and grandfather were both theology professors in Göttingen, his father was a law professor in Kiel and Munich, and his paternal uncle was a judge.

Planck was born in Kiel to Johann Julius Wilhelm Planck and his second wife, Emma Patzig. He was the sixth child in the family, though two of his siblings were from his father's first marriage. Among his earliest memories was the marching of Prussian and Austrian troops into Kiel during the Danish-Prussian war 1864. In 1867 the family moved to Munich, and Planck enrolled in the Maximilians gymnasium, where he came under the tutelage of Hermann Müller, a mathematician who took an interest in the youth, and taught him astronomy and mechanics as well as mathematics. It was from Müller that Planck first learned the principle of conservation of energy. Planck graduated early, at age 16. This is how Planck first came in contact with the field of physics.

Education

Planck was extremely gifted when it came to music: he took singing lessons and played the piano, organ and cello, and composed songs and operas. However, instead of music he chose to study physics.

Munich physics professor Philipp von Jolly advised him against going into physics, saying, "in this field, almost everything is already discovered, and all that remains is to fill a few holes." Planck replied that he did not wish to discover new things, only to understand the known fundamentals of the field, and began his studies in 1874 at the University of Munich. Under Jolly's supervision, Planck performed the only experiments of his scientific career, studying the diffusion of hydrogen through heated platinum, but soon transferred to theoretical physics.

In 1877 he went to Berlin for a year of study with the famous physicists Hermann von Helmholtz and Gustav Kirchhoff and the mathematician Karl Weierstrass. He wrote that Helmholtz was never quite prepared, spoke slowly, miscalculated endlessly, and bored his listeners, while Kirchhoff spoke in carefully prepared lectures, which were, however, dry and monotonous. Despite this he soon became close friends with Helmholtz. While there he mostly undertook a program of self-study of Clausius's writings, which led him to choose heat theory as his field.

In October 1878 Planck passed his qualifying exams and in February 1879 defended his dissertation, Über den zweiten Hauptsatz der mechanischen Wärmetheorie (On the second fundamental theorem of the mechanical theory of heat). He briefly taught mathematics and physics at his former school in Munich.

In June 1880 he presented his habilitation thesis, Gleichgewichtszustände isotroper Körper in verschiedenen Temperaturen (Equilibrium states of isotropic bodies at different temperatures).

Academic career

With the completion of his habilitation thesis, Planck became an unpaid private lecturer in Munich, waiting until he was offered an academic position. Although he was initially ignored by the academic community, he furthered his work on the field of heat theory and discovered one after the other the same thermodynamical formalism as Gibbs without realizing it. Clausius's ideas on entropy occupied a central role in his work.

In April 1885 the University of Kiel appointed Planck an associate professor of theoretical physics. Further work on entropy and its treatment, especially as applied in physical chemistry, followed. He proposed a thermodynamic basis for Arrhenius's theory of electrolytic dissociation.

Within four years he was named the successor to Kirchhoff's position at the University of Berlin — presumably thanks to Helmholtz's intercession — and by 1892 became a full professor. In 1907 Planck was offered Boltzmann's position in Vienna, but turned it down to stay in Berlin. During 1909 he was the Ernest Kempton Adams Lecturer in Theoretical Physics at Columbia University in New York City. He retired from Berlin on 10 January, 1926, and was succeeded by Erwin Schrödinger.

Family

In March 1887 Planck married Marie Merck (1861-1909), sister of a school fellow, and moved with her into a sublet apartment in Kiel. They had four children: Karl (1888-1916), the twins Emma (1889-1919) and Grete (1889-1917), and Erwin (1893-1945).

After the appointment to Berlin the Planck family lived in a villa in Berlin-Grunewald, Wangenheimstraße 21. Several other professors of Berlin University lived nearby, among them the famous theologian Adolf von Harnack, who became a close friend of Planck. Soon the Planck home became a social and cultural centre; numerous well-known scientists, such as Albert Einstein, Otto Hahn and Lise Meitner, were frequent visitors. The tradition of jointly playing music had already been established in the home of Helmholtz.

After several happy years the Planck family was struck by a series of disasters: in July 1909 Marie Planck died, possibly from tuberculosis. In March 1911 Planck married his second wife, Marga von Hoesslin (1882-1948); in December his third son, Herrmann, was born.

During the First World War Planck's oldest son, Karl, was killed in action at Verdun, and Erwin was taken prisoner by the French in 1914. Grete died in 1917 while giving birth to her first child; her sister lost her life two years later in the same circumstances, after marrying Grete's widower. Both granddaughters survived and were named after their mothers. Planck endured all these losses with stoic submission to fate.

In January 1945 his second son, Erwin, to whom he had been particularly close, was executed by the Nazis because of his participation in the failed attempt to assassinate Hitler in July 1944.
  • Wives: Marie Merck (m. 1887), Marga von Hoesslin (m. 1910)
  • Children: Karl (1888-1916), twins Emma (1889-1919) and Grete (1889-1917), Erwin (1893-1945), Herrmann (b. 1911)

Professor at Berlin University

In Berlin, Planck joined the local Physical Society. He later wrote about this time: "In those days I was essentially the only theoretical physicist there, whence things were not so easy for me, because I started mentioning entropy, but this was not quite fashionable, since it was regarded as a mathematical spook". Thanks to his initiative, the various local Physical Societies of Germany merged in 1898 to form the German Physical Society (Deutsche Physikalische Gesellschaft, DPG); from 1905 to 1909 Planck was the president.

Planck started a six-semester course of lectures on theoretical physics, "dry, somewhat impersonal" according to Lise Meitner, "using no notes, never making mistakes, never faltering; the best lecturer I ever heard" according to an English participant, James R. Partington, who continues: "There were always many standing around the room. As the lecture-room was well heated and rather close, some of the listeners would from time to time drop to the floor, but this did not disturb the lecture". Planck did not establish an actual "school", the number of his graduate students was only about 20 altogether, among them the following:

Max Abraham 1897 (1875 - 1922)
Moritz Schlick 1904 (1882 - 1936)
Walther Meißner 1906 (1882 - 1974)
Max von Laue 1906 (1879 - 1960)
Fritz Reiche 1907 (1883 - 1960)
Walter Schottky 1912 (1886 - 1976)
Walther Bothe 1914 (1891 - 1957)

Black-body radiation

In 1894 Planck turned his attention to the problem of black-body radiation. He had been commissioned by electricity companies to discover how to create the most light from lightbulbs with the minimum energy. The problem had been stated by Kirchhoff in 1859: how does the intensity of the electromagnetic radiation emitted by a black body (a perfect absorber, also known as a cavity radiator) depend on the frequency of the radiation (e.g., the colour of the light) and the temperature of the body? The question had been explored experimentally, but no theoretical treatment gave sufficient agreement with the experimental values. Wilhelm Wien proposed Wien's law, which correctly predicted the behaviour at high frequencies, but failed at low frequencies. The Rayleigh-Jeans law, another approach to the problem, created what was much later known as the "ultraviolet catastrophe", but contrary to many textbooks this was not, in fact, a motivation for Planck.[1]

Planck's first proposed solution to the problem in 1899 followed from what Planck called the "principle of elementary disorder", which allowed him to derive Wien's law from a number of assumptions about the entropy of an ideal oscillator, creating what was referred to as the Wien-Planck law. Soon afterwards it was found that experimental evidence did not confirm the new law at all, to Planck's frustration. Planck revised his approach, deriving the first version of the famous Planck black-body radiation law, which described the experimentally observed black-body spectrum very well; it was first proposed in a meeting of the DPG on 19 October, 1900 and published in 1901. This first derivation did not, however, include energy quantization, nor did it include any use of statistical mechanics, to which he held a strong aversion. In November 1900, Planck revised this first approach, relying on Boltzmann's statistical interpretation of the second law of thermodynamics as a way of gaining a more fundamental understanding of the principles behind his radiation law. As Planck was deeply suspicious of the philosophical and physical implications of such an interpretation of Boltzmann's approach, his recourse to them was, as he later put it, "an act of despair ... I was ready to sacrifice any of my previous convictions about physics."[1]

The central assumption behind his new derivation, presented to the DPG on 14 December 1900, was the supposition that the electromagnetic energy could be emitted only in quantized form, in other words, the energy could only be a multiple of an elementary unit , where is Planck's constant, also known as Planck's action quantum (introduced already in 1899), and is the frequency of the radiation.

Enlarge picture
Planck in 1918, the year he received the Nobel Prize in Physics for his work on quantum theory
At first Planck considered that the quantisation was only as "a purely formal assumption ... actually I did not think much about it..."; nowadays this assumption, incompatible with classical physics, is regarded as the birth of quantum physics and the greatest intellectual accomplishment of Planck's career (however, Ludwig Boltzmann had already in 1877, in a theoretical paper, been discussing the possibility that the energy states of a physical system could be discrete). The full interpretation of the radical implications of Planck's work was advanced by Albert Einstein in 1905—for this reason, the philosopher and historian of science Thomas Kuhn argued that Einstein should be given credit for quantum theory more so than Planck, since Planck did not understand in a deep sense that he was "introducing the quantum" as a real physical entity.[2] In any case, it was in recognition of his monumental accomplishment that Planck was awarded the Nobel Prize in Physics in 1918.

The discovery of Planck's constant enabled him to define a new universal set of physical units (such as the Planck length and the Planck mass), all based on fundamental physical constants.

Subsequently, Planck tried to grasp the meaning of the energy quanta, but to no avail. "My unavailing attempts to somehow reintegrate the action quantum into classical theory extended over several years and caused me much trouble." Even several years later, other physicists like Rayleigh, Jeans, and Lorentz set Planck's constant to zero in order to align with classical physics, but Planck knew well that this constant had a precise nonzero value. "I am unable to understand Jeans' stubbornness — he is an example of a theoretician as should never be existing, the same as Hegel was for philosophy. So much the worse for the facts, if they are wrong."

Max Born wrote about Planck: "He was by nature and by the tradition of his family conservative, averse to revolutionary novelties and skeptical towards speculations. But his belief in the imperative power of logical thinking based on facts was so strong that he did not hesitate to express a claim contradicting to all tradition, because he had convinced himself that no other resort was possible."

Einstein and the theory of relativity

Enlarge picture
Max Planck presents Albert Einstein with the Max-Planck medal, Berlin June 28, 1929


In 1905 the three epochal papers of the hitherto completely unknown Albert Einstein were published in the journal Annalen der Physik; Planck was among the few who immediately recognized the significance of the special theory of relativity. Thanks to his influence this theory was soon widely accepted in Germany. Planck also contributed considerably to extend the special theory of relativity.

However, Einstein's hypothesis of light quanta (photons), based on Philipp Lenard's 1902 discovery of the photoelectric effect, was initially rejected by Planck; he was unwilling to discard completely Maxwell's theory of electrodynamics. "The theory of light would be thrown back not by decades, but by centuries, into the age when Christian Huygens dared to fight against the mighty emission theory of Isaac Newton ..."

In 1910 Einstein pointed out the anomalous behavior of specific heat at low temperatures as another example of a phenomenon which defies explanation by classical physics. Planck and Nernst, in order to clarify the increasing number of contradictions, organized the First Solvay Conference (Brussels 1911); at this meeting Einstein was finally able to convince Planck.

Meanwhile Planck had been appointed dean of Berlin University, whereby it was possible for him to call Einstein to Berlin and establish a new professorship for him (1914). Soon the two scientists became close friends and met frequently to play music together.

World War and Weimar Republic

At the onset of the First World War Planck was not immune to the general excitement of the public: "... besides of much horrible also much unexpectedly great and beautiful: the swift solution of the most difficult issues of domestic policy through arrangement of all parties... the higher esteem for all that is brave and truthful..." Admittedly, he refrained from the extremes of nationalism, e.g., he voted successfully for a scientific paper from Italy receiving a prize from the Prussian Academy of Sciences in 1915 (Planck was one of its four permanent presidents), although at that time Italy was about to join the Allies; nevertheless the infamous "Manifesto of the 93 intellectuals", a polemic pamphlet of war propaganda, was also signed by Planck, while Einstein retained a strictly pacifistic attitude which almost led to his imprisonment (from which he was only saved by his Swiss citizenship). But already in 1915 Planck revoked (after several meetings with Dutch physicist Lorentz) parts of the Manifesto, and in 1916 he signed a declaration against German annexationism.

In the turbulent post-war years, Planck, by now the highest authority of German physics, issued the slogan "persevere and continue working" to his colleagues. In October 1920 he and Fritz Haber established the Notgemeinschaft der Deutschen Wissenschaft (Emergency Organization of German Science), which aimed at providing support for the destitute scientific research; the funds they could distribute were raised to a considerable part abroad. In this time Planck held leading positions also at Berlin University, the Prussian Academy of Sciences, the German Physical Society and the Kaiser-Wilhelm-Gesellschaft (which in 1948 became the Max-Planck-Gesellschaft); under such conditions he was hardly able to conduct any more research himself.

He became a member of the Deutsche Volks-Partei (German People's Party), the party of peace Nobel prize laureate Gustav Stresemann, which aspired to liberal aims for domestic policy and rather revisionistic aims for international politics. He disagreed with the introduction of universal suffrage and expressed later the view that the Nazi dictatorship was the result of "the ascent of the rule of the crowds".

Quantum mechanics

At the end of the 1920s Bohr, Heisenberg and Pauli had worked out the Copenhagen interpretation of quantum mechanics, but it was rejected by Planck, as well as Schrödinger and Laue; even Einstein had rejected Bohr's interpretation. Planck expected that wave mechanics would soon render quantum theory—his own child—unnecessary. This was not to be the case, however—further work only cemented quantum theory, even against his and Einstein's philosophical revulsions. Planck experienced the truth of his own earlier observation from his struggle with the older views in his younger years: "A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it."[3]

Nazi dictatorship and Second World War

When the Nazis seized power in 1933, Planck was 74; he witnessed many Jewish friends and colleagues expelled from their positions and humiliated, and hundreds of scientists emigrated from Germany. Again he tried the "persevere and continue working" slogan and asked scientists who were considering emigration to stay in Germany. He hoped the crisis would abate soon and the political situation would improve again. There was also a deeper argument against emigration; emigrating German non-Jewish scientists would need to look for academic positions abroad, but these positions better served Jewish scientists, who had no chance of continuing to work in Germany.

Hahn asked Planck to gather well-known German professors in order to issue a public proclamation against the treatment of Jewish professors, but Planck replied, "If you are able to gather today 30 such gentlemen, then tomorrow 150 others will come and speak against it, because they are eager to take over the positions of the others."[4] Under Planck's leadership, the Kaiser-Wilhelm-Gesellschaft (KWG) avoided open conflict with the Nazi regime, except concerning Fritz Haber. Planck tried to discuss the issue with Adolf Hitler but was unsuccessful. In the following year, 1934, Haber died in exile.

One year later, Planck, having been the president of the KWG since 1930, organized in a somewhat provocative style an official commemorative meeting for Haber. He also succeeded in secretly enabling a number of Jewish scientists to continue working in institutes of the KWG for several years. In 1936, his term as president of the KWG ended, and the Nazi government put pressure on him to refrain from running for another term.

As the political climate in Germany gradually became more hostile, Johannes Stark, prominent exponent of Deutsche Physik ("German Physics", also called "Aryan Physics") attacked Planck, Sommerfeld and Heisenberg for continuing to teach the theories of Einstein, calling them "white Jews." The "Hauptamt Wissenschaft" (Nazi government office for science) started an investigation of Planck's ancestry, but all they could find out was that he was "1/16 Jewish."

In 1938, Planck celebrated his 80th birthday; the DPG held an official celebration, during which the Max-Planck medal (founded as the highest medal by the DPG in 1928) was awarded to French physicist Louis de Broglie. At the end of 1938 the Prussian Academy lost its remaining independence and was taken over by Nazis (Gleichschaltung); Planck protested by resigning his presidency. He continued to travel frequently, giving numerous public talks, such as his famous talk on Religion and Science, and five years later he was still sufficiently fit to climb 3,000-meter peaks in the Alps.

During the Second World War, the increasing number of Allied bombing campaigns against Berlin forced Planck and his wife to leave the city temporarily and live in the countryside. In 1942 he wrote: "In me an ardent desire has grown to persevere this crisis and live long enough to be able to witness the turning point, the beginning of a new rise." In February 1944 his home in Berlin was completely destroyed by an air raid, annihilating his entire scientific records and correspondence. Finally, he got into a dangerous situation in his rural retreat due to the rapid advance of the Allied armies from both sides. After the end of the war he was brought to a relative in Göttingen.

Planck endured many personal tragedies after the age of 50. In 1909, his first wife died after 22 years of marriage, leaving him with two sons and twin daughters. Planck's oldest son, Karl, was killed in action in 1916, his daughter Margarete died in childbirth in 1917, and another daughter, Emma died in childbirth in 1919. During World War II, Planck's house in Berlin was completely destroyed by bombs in 1944 and his youngest son, Erwin, was implicated in the attempt made on Hitler's life on July 20, 1944. Consequently, Erwin died a horrible death at the hands of the Gestapo in 1945. Erwin's death destroyed Planck's will to live. By the end of the war, Planck, his second wife and his son by her, moved to Göttingen where he died on October 4, 1947.

Religious view

Max Planck was a devoted and persistent adherent of Christianity from early life to death, but he was very tolerant towards alternate views and religions, and so was discontent with the church organizations' demands for unquestioning belief.

The God in which Max Planck believed was an almighty, all-knowing, benevolent but unintelligible God that permeated everything, manifest by symbols, including physical laws. His view may have been motivated by an opposition like Einstein's and Schrödinger's against the positivist, statistical subjective quantum mechanics universe of Bohr, Heisenberg and others. Planck was interested in truth and Universe beyond observation, and so objected against atheism as an obsession with symbols.

Planck regarded the scientist as a man of imagination and faith, "faith" interpreted as being similar to "having a working hypothesis". For example the causality principle isn't true or false, it is an act of faith. Thereby Planck may have indicated a view that points toward Imre Lakatos' research programs process descriptions, where falsification is mostly tolerable, in faith of its future removal. [5]

Enlarge picture
Max Planck was posthumously commemorated on the German 2 Mark Coin

Honours and medals

  • "Pour le Mérite" for Science and Arts 1915 (in 1930 he became chancellor of this order)
  • Nobel Prize in Physics 1918 (awarded 1919)
  • Lorentz Medal 1927
  • Adlerschild des Deutschen Reiches (1928)
  • Max Planck medal (1929, together with Einstein)
  • Planck received honorary doctorates from the universities of Frankfurt, Munich (TH), Rostock, Berlin (TH), Graz, Athens, Cambridge, London, and Glasgow.
  • The asteroid 1069 was given the name "Stella Planckia" (1938)

See also

* Planck density

Notes

1. ^ For a solid approach to the complexity of Planck's intellectual motivations for the quantum, for his reluctant acceptance of its implications, see Helge Kragh, Max Planck: the reluctant revolutionary, Physics World. December 2000.
2. ^ Thomas Kuhn, Black-Body Theory and the Quantum Discontinuity: 1894-1912 (Clarendon Press, Oxford, 1978).
3. ^ Quoted in Thomas Kuhn, The Structure of Scientific Revolutions (1970 ed.): p. 150.
4. ^ In a slightly different translation, Hahn remembers Planck saying: “If you bring together 30 such men today, then tomorrow 150 will come to denounce them because they want to take their places.” This translated quote is found in: Heilbron, 2000, p. 150. Heilbron, at the end of the paragraph, on p. 151, cites the following references to Hahn’s writings: Otto Hahn Einige persönliche Erinnerungen an Max Planck MPG, Mitteilungen (1957) p. 244, and Otto Hahn My Life (Herder and Herder, 1970) p. 140.
5. ^ adherents.com: The Religious Affiliation of Physicist Max Planck

Publications

Bibliography

  • Heilbron, J. L. The Dilemmas of an Upright Man: Max Planck and the Fortunes of German Science (Harvard, 2000) ISBN 0-674-00439-6
  • Rosenthal-Schneider, Ilse Reality and Scientific Truth: Discussions with Einstein, von Laue, and Planck (Wayne State University, 1980) ISBN 0-8143-1650-6

External links

Biographies

Articles




Persondata
NAMEPlanck, Max
ALTERNATIVE NAMESMax Karl Ernst Ludwig Planck
SHORT DESCRIPTIONGerman physicist, founder of quantum theory
DATE OF BIRTHApril 23 1858
PLACE OF BIRTHKiel, Germany
DATE OF DEATHOctober 4 1947
PLACE OF DEATHGöttingen, Germany
Planck may also refer to:-
  • Planck's law of black body radiation
  • Planck's constant
  • Planck units
  • Planck time
  • Planck length

..... Click the link for more information.
March 23 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events

  • 625 - Battle of Uhud takes place between Muslims and Pagans in Arabia

..... Click the link for more information.
18th century - 19th century - 20th century
1820s  1830s  1840s  - 1850s -  1860s  1870s  1880s
1855 1856 1857 - 1858 - 1859 1860 1861

:
Subjects:     Archaeology - Architecture -
..... Click the link for more information.
Kiel
Aerial view of the city
Coat of arms Location

..... Click the link for more information.
Anthem
"Das Lied der Deutschen" (third stanza)
also called "Einigkeit und Recht und Freiheit"
..... Click the link for more information.
September 4 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events


..... Click the link for more information.
19th century - 20th century - 21st century
1910s  1920s  1930s  - 1940s -  1950s  1960s  1970s
1944 1945 1946 - 1947 - 1948 1949 1950

Year 1947 (MCMXLVII
..... Click the link for more information.

..... Click the link for more information.
Anthem
"Das Lied der Deutschen" (third stanza)
also called "Einigkeit und Recht und Freiheit"
..... Click the link for more information.
Anthem
"Das Lied der Deutschen" (third stanza)
also called "Einigkeit und Recht und Freiheit"
..... Click the link for more information.
Anthem
"Das Lied der Deutschen" (third stanza)
also called "Einigkeit und Recht und Freiheit"
..... Click the link for more information.
physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena spanning all length scales: from the sub-atomic particles from which all ordinary matter is made (particle physics) to the behavior of the material Universe as a whole
..... Click the link for more information.
University of Kiel (German Christian-Albrechts-Universität zu Kiel, CAU) is a university in the city of Kiel, Germany. It was founded in 1665 as the Academia Holsatorum Chiloniensis
..... Click the link for more information.
Humboldt University of Berlin (German Humboldt-Universität zu Berlin) is Berlin's oldest university, founded in 1810 as the University of Berlin (Universität zu Berlin
..... Click the link for more information.
Georg-August University of Göttingen (Georg-August-Universität Göttingen, often called the Georgia Augusta) is a German university, founded in 1734 by George II, King of Great Britain and Elector of Hanover, and opened in 1737.
..... Click the link for more information.
Ludwig Maximilian University of Munich (German: Ludwig-Maximilians-Universität München), also known as LMU, is a university in Munich and, with almost 47,000 students, is the biggest university in Germany.
..... Click the link for more information.
Johann Philipp Gustav von Jolly (September 26 1809 – December 24 1884 in Munich) was a German physicist and mathematician.

Born in Mannheim as the son of merchant Louis Jolly and Marie Eleonore Jolly, he studied science in Heidelberg, Vienna and Berlin.
..... Click the link for more information.
Gustav Ludwig Hertz

Gustav Ludwig Hertz (1887 - 1975)
Born July 22 1887(1887--)
Hamburg, Germany
..... Click the link for more information.
ōErich Kretschmann (1887-1973) was a German mathematician and Gymnasium (school) teacher.

He obtained his D.Phil. at Berlin University in 1914 with his dissertation entitled "Eine Theorie der Schwerkraft im Rahmen der ursprünglichen Einsteinschen
..... Click the link for more information.
Fritz Walther Meißner (or Meissner) (December 16, 1882, Berlin - November 16, 1974, Munich) was a German technical physicist.

He studied mechanical engineering and physics at Munich Institute of Technology, his doctoral supervisor being Max Planck.
..... Click the link for more information.
Walter Hermann Schottky (July 23, 1886, Zürich, Switzerland – March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens.
..... Click the link for more information.
Max von Laue

Max von Laue
Born September 9 1879(1879--)
Pfaffendorf, Germany
Died March 24 1960 (aged 82)
..... Click the link for more information.
For the music publisher, see Max Abraham (publisher).
Max Abraham (March 26 1875 – November 16 1922) was a German physicist.

Abraham was born in Danzig, Germany (now Gdańsk in Poland) to a family of Jewish merchants.
..... Click the link for more information.
Moritz Schlick listen   (April 14, 1882–June 22, 1936) was a German philosopher and the founding father of logical positivism and the Vienna Circle.
..... Click the link for more information.
Walther Bothe

Walther Bothe
Born January 8, 1891
Oranienburg, Germany
Died January 8 1957 (aged 66)
Heidelberg, Germany
Nationality German
Field Physicist
..... Click the link for more information.
Planck constant (denoted ) is a physical constant that is used to describe the sizes of quanta. It plays a central role in the theory of quantum mechanics, and is named after Max Planck, one of the founders of quantum theory.
..... Click the link for more information.
quantum mechanics is the study of the relationship between energy quanta (radiation) and matter, in particular that between valence shell electrons and photons. Quantum mechanics is a fundamental branch of physics with wide applications in both experimental and theoretical physics.
..... Click the link for more information.
Nobel Prize in Physics (Swedish: Nobelpriset i fysik) is awarded once a year by the Royal Swedish Academy of Sciences. It is one of the six Nobel Prizes. The first prize was awarded in 1901.
..... Click the link for more information.
Erwin Planck (12 March 1893 – 23 January 1945) was a German politician, and a resistance fighter in the Third Reich.

Born in Berlin, Erwin Planck was the fourth child of theoretical physicist Max Planck and his first wife.
..... Click the link for more information.
quantum mechanics is the study of the relationship between energy quanta (radiation) and matter, in particular that between valence shell electrons and photons. Quantum mechanics is a fundamental branch of physics with wide applications in both experimental and theoretical physics.
..... Click the link for more information.


This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.