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physics
Erwin Schrödinger and his Famous Thought Experiment

Erwin Schrödinger and his Famous Thought Experiment

Harald Sack
On August 12, 1887, Austrian physicist and Nobel Laureate Erwin Schrödinger was born. Schrödinger developed a number of fundamental results in the field of quantum theory, which formed the basis of wave mechanics: he formulated the wave equation and revealed the identity of his development of the formalism and matrix mechanics. Schrödinger proposed an original interpretation of the physical meaning of the wave function. Although many of you are not physicists, you…
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mathematics
Oswald Veblen and Foundations of modern Topology

Oswald Veblen and Foundations of modern Topology

Harald Sack
On June 24, 1880, American mathematician, geometer and topologist Oswald Veblen was born. Veblen‘s work found application in atomic physics and the theory of relativity. He proved the Jordan curve theorem in 1905 while this was long considered the first rigorous proof, many now also consider Jordan‘s original proof rigorous. “Mathematics is one of the essential emanations of the human spirit, a thing to be valued in and for itself, like art…
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psychology
Gustave le Bon and the Behaviour of the Crowd

Gustave le Bon and the Behaviour of the Crowd

Tabea Tietz
On May 7, 1841, French social psychologist, sociologist, anthropologist, inventor, and amateur physicist Gustave le Bon was born. Le Bon is best known for his study of the psychological characteristics of crowds, The Crowd, Study of Popular Mind. His writings incorporate theories of national traits, racial and male superiority, herd behavior and crowd psychology. “Logical minds, accustomed to being convinced by a chain of somewhat close reasoning, cannot avoid having recourse to this mode of…
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physics
The Case of J. Robert Oppenheimer

The Case of J. Robert Oppenheimer

Harald Sack
On April 22, 1904, American physicist J. Robert Oppenheimer was born. Oppenheimer was the wartime head of the Los Alamos Laboratory and is among those who are credited with being the “father of the atomic bomb” for their role in the Manhattan Project, the World War II undertaking that developed the first nuclear weapons. Oppenheimer‘s achievements in physics included the Born–Oppenheimer approximation for molecular wave functions, work on the theory of electrons…
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chemistry
Ernest Solvay and his Love for Physics

Ernest Solvay and his Love for Physics

Harald Sack
On April 16, 1838, Belgian chemist, industrialist and philanthropist Ernest Gaston Joseph Solvay was born. Solvay invented the Solvay Process (1863), a commercially viable ammonia-soda process for producing soda ash (sodium carbonate), widely used in the manufacture of such products as glass and soap. In 1911, he began a series of important conferences in physics, known as the Solvay Conferences, whose participants included luminaries such as Max Planck, Ernest Rutherford, Maria Skłodowska-Curie, Henri…
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music
Dayton Miller – An Advocat of Aether Theory

Dayton Miller – An Advocat of Aether Theory

Tabea Tietz
On March 13, 1866, American physicist, astronomer, acoustician Dayton Clarence Miller was born. An early experimenter of X-rays, Miller was an advocate of aether theory and absolute space and an opponent of Albert Einstein’s theory of relativity.[4] Early Years Born in Ohio to Charles Webster Dewey and Vienna Pomeroy Miller, Dayton Miller attended Baldwin University and earned his doctorate in astronomy at Princeton University. At the Case School of Applied Science in…
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physics
Paul Langevin and the Langevin Dynamics

Paul Langevin and the Langevin Dynamics

Harald Sack
On January 23, 1872, French physicist Paul Langevin was born. He is best known for having developed Langevin dynamics and the Langevin equation. Being a public opponent against fascism in the 1930s resulted in his arrest and consequently he was held under house arrest by the Vichy government for most of the war. Langevin was also the first to explain (1905) the effects of paramagnetism and diamagnetism (the weak attraction or repulsion…
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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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mathematics
Hermann Weyl – between Pure Mathematics and Theoretical Physics

Hermann Weyl – between Pure Mathematics and Theoretical Physics

Tabea Tietz
On November 9, 1885, German mathematician, theoretical physicist and philosopher Hermann Weyl was born. Weyl was one of the most influential mathematicians of the 20th century. His widely varied contributions in mathematics linked pure mathematics and theoretical physics. He made significant contributions to quantum mechanics and the theory of relativity. He attempted to incorporate electromagnetism into the geometric formalism of general relativity. “In these days the angel of topology and the devil of abstract…
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physics
Karl Schwarzschild and the Event Horizon

Karl Schwarzschild and the Event Horizon

Tabea Tietz
On October 9, 1873, German physicist and astronomer Karl Schwarzschild was born. He provided the first exact solution to the Einstein field equations of general relativity, for the limited case of a single spherical non-rotating mass, which he accomplished in 1915, the same year that Albert Einstein first introduced general relativity. The Schwarzschild solution leads to a derivation of the Schwarzschild radius, which is the size of the event horizon of a…
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