Peter Debye

Arnold Sommerfeld – Quantum Theory and Famous Students

Arnold Sommerfeld – Quantum Theory and Famous Students

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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Felix Bloch and the Nuclear Magnetic Resonance Method

Felix Bloch and the Nuclear Magnetic Resonance Method

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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Peter Debye – Dipole Moments, X Rays, and Light Scattering

Peter Debye – Dipole Moments, X Rays, and Light Scattering

On March 24, 1884, Dutch-American physicist and physical chemist Peter Joseph William Debye was born. Debye’s investigations of dipole moments, X rays, and light scattering in gases brought him the 1936 Nobel Prize in Chemistry. Most of his work was in chemical-physics with special interest in electrolytes and dipolar momentum analysis. He established a theory of specific heat with some improvements on that proposed by Einstein.[5] “If a problem is clearly stated,…
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Lars Onsager and Irreversible Chemical Processes

Lars Onsager and Irreversible Chemical Processes

On November 27, 1903, Norwegian-born American physical chemist and theoretical physicist Lars Onsager was born. The development of a general theory of irreversible chemical processes gained him the 1968 Nobel Prize for Chemistry. These Onsager reciprocal relations have importance in a wide range of applications. Education Lars Onsager was born in Kristiania (today’s Oslo), Norway, to Erling Onsager, a Barrister of the Supreme Court of Norway, and Ingrid, née Kirkeby. After completing…
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