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Werner Heisenberg

physics
Lev Landau – Superfluidity, the Hydrogen Bomb and Sarcastic Remarks

Lev Landau – Superfluidity, the Hydrogen Bomb and Sarcastic Remarks

Tabea Tietz
On January 22, 1908, Soviet physicist and Nobel Laureate Lev Landau was born. Landau made fundamental contributions to many areas of theoretical physics. He received the 1962 Nobel Prize in Physics for his development of a mathematical theory of superfluidity that accounts for the properties of liquid helium II  at a temperature below 2.17 K (−270.98 °C). Lev Landau – Early Years Lev Landau was the son of the Caspian-Black Sea Joint-Stock Company…
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physics
Max Born and the statistical interpretation of the Wave Function

Max Born and the statistical interpretation of the Wave Function

Harald Sack
On December 11, 1882, German physicist, mathematician, and Nobel Laureate Max Born was born, who was instrumental in the development of quantum mechanics. He also made contributions to solid-state physics and optics and supervised the work of a number of notable physicists in the 1920s and 1930s. “Can we call something with which the concepts of position and motion cannot be associated in the usual way, a thing, or a particle? And if…
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physics
Wolfgang Paul and the Quadrupole Ion Trap

Wolfgang Paul and the Quadrupole Ion Trap

Harald Sack
On August 10, 1913, German physicist Wolfgang Paul was born. Paul co-developed the non-magnetic quadrupole mass filter which laid the foundation for what we now call an ion trap. He shared one-half of the Nobel Prize in Physics in 1989 for this work with Hans Georg Dehmelt; the other half of the Prize in that year was awarded to Norman Foster Ramsey, Jr. Ion traps can be used as a component of…
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physics
Arnold Sommerfeld – Quantum Theory and Famous Students

Arnold Sommerfeld – Quantum Theory and Famous Students

Harald Sack
On December 5, 1868, German theoretical physicist Arnold Sommerfeld was born. Sommerfeld pioneered developments in atomic and quantum physics, and also educated and mentored a large number of students for the new era of theoretical physics. He served as PhD supervisor for more Nobel prize winners in physics than any other supervisor to date. He introduced the 2nd quantum number (azimuthal quantum number) and the 4th quantum number (spin quantum number). He…
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physics
Felix Bloch and the Nuclear Magnetic Resonance Method

Felix Bloch and the Nuclear Magnetic Resonance Method

Tabea Tietz
On October 23, 1905, Swiss-born American physicist Felix Bloch was born. He is best known for his investigations into nuclear induction and nuclear magnetic resonance, which are the underlying principles of MRI. He was awarded the 1952 Nobel Prize in Physics for developing the nuclear magnetic resonance (NMR) method of measuring the magnetic field of atomic nuclei. “While I am certainly not asking you to close your eyes to the experiences of earlier generations,…
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chemistry
Robert Mulliken and the Molecular Orbitals

Robert Mulliken and the Molecular Orbitals

Tabea Tietz
On June 7, 1896, American physicist, chemist, and Nobel Laureate Robert Sonderson Mulliken was born. He is primarily responsible for the early development of molecular orbital theory, i.e. the elaboration of the molecular orbital method of computing the structure of molecules. “…the more accurate the calculations became, the more the concepts tended to vanish into thin air.” — Robert Mulliken, about using old-fashioned chemistry to describe molecular structure, in Molecular Scientists and…
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physics
Frederick Reines’ Chase for the Ghost Particle

Frederick Reines’ Chase for the Ghost Particle

Tabea Tietz
On March 16, 1918, American physicist and Nobel Laureate Frederick Reines was born. He is best known for his co-detection of the neutrino with Clyde Cowan in the neutrino experiment. The neutrino is a subatomic particle, a tiny lepton with little or no mass and a neutral charge which had been postulated by Wolfgang Pauli in the early 1930s but had previously remained undiscovered. Reines shared the Nobel Prize with physicist Martin…
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physics
Niels Bohr and the Origins of Quantum Mechanics

Niels Bohr and the Origins of Quantum Mechanics

Tabea Tietz
On October 7, 1885, Danish physicist and Nobel Laureate Niels Bohr was born. Bohr made foundational contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel Prize in Physics in 1922. “Physics is to be regarded not so much as the study of something a priori given, but rather as the development of methods of ordering and surveying human experience. In this respect our task must be to account…
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physics
Theodore Maiman and the Invention of the Laser

Theodore Maiman and the Invention of the Laser

Tabea Tietz
On May 16, 1960, American physicist Theodore Maiman presents the world’s first operating laser at Hughes Research Laboratories, Malibu, California. Today, lasers are present everywhere, ranging from common consumer devices such as DVD players, laser printers, and barcode scanners to professional laser devices for surgery and various other skin treatments, or in industry for cutting and welding materials. Actually, it was Albert Einstein, who has laid the theoretical foundations for the laser in his…
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physics
Werner Heisenberg and the Uncertainty Principle

Werner Heisenberg and the Uncertainty Principle

Harald Sack
On December 5, 1901, German theoretical physicist and Nobel Prize laureate Werner Heisenberg was born, who along with Max Born and Pascual Jordan laid the foundations of quantum mechanics. He is probably best known for his Uncertainty Principle, asserting a fundamental limit to the precision with which certain physical properties can be known. “The more precise the measurement of position, the more imprecise the measurement of momentum, and vice versa.” — Werner Heisenberg,…
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