Prospects And Dangers In An Age Of Science (Offprint From Det Kongelige Norske Videnskabers Selskabs Forhandlinger Bind 36, 1963)

Kronig, Ralph

Edité par Kommisjon Hos F. Bruns Bokhandel, Trondheim Norway, 1963

A propos de cet article

11 Pp. Offprint In Printed Wrappers. Ralph Kronig (1904 ? 1995) Was A German Physicist. Early In Kronig's Career, While A Student In America, He Had Encountered Paul Ehrenfest Who, While Visiting America In 1924, Had Advised Kronig To Revisit Europe. Kronig Left For That Continent Later In 1924 And Paid Visits To The Important Centers For Theoretical-Physics Research In Germany And Copenhagen. Kronig Was Privileged To Be A Young, Brilliant Physicist In That Glory-Day Of 20Th Century Theoretical Physics, Which Made It Possible For Him To Live And Work Among The Great Physicists Of That Era (Bohr, Ehrenfest, Heisenberg, Pauli, Kramers). In January 1925, When Kronig Was Still A Columbia University Phd Student, He First Proposed Electron Spin After Hearing Pauli In Tübingen. Werner Heisenberg And Wolfgang Pauli Immediately Hated The Idea. They Had Just Ruled Out All Imaginable Actions From Quantum Mechanics. Now Kronig Was Proposing To Set The Electron Rotating In Space. Pauli Especially Ridiculed The Idea Of Spin, Saying That "It Is Indeed Very Clever But Of Course Has Nothing To Do With Reality". Faced With Such Criticism, Kronig Decided Not To Publish His Theory And The Idea Of Electron Spin Had To Wait For Others To Take The Credit. Kronig Had Come Up With The Idea Of Electron Spin Several Months Before Uhlenbeck And Goudsmit; Most Textbooks Credit These Two Dutch Physicists With The Discovery. Kronig Had Told Pauli About Electron Spin Before Pauli Had Published His Paper Showing That Two Electrons Can Inhabit The Same Orbital (W. Pauli, "On The Connexion Between The Completion Of Electron Groups In An Atom With The Complex Structure Of Spectra", Z. Physik 31, 765Ff, 1925). Months Later When Uhlenbeck And Goudsmit Came Up With Particle Spin, It Seemed To Verify Pauli's Paper. Together With Rabi, Kronig Gave The First Solution (1927) Of The Schrödinger Equation For The Rigid Symmetric Top. Werner Heisenberg In Developing Quantum Mechanics Involved Kronig In His Seminal Ideas Of The Theory. In The Beginning Of May 1925, Heisenberg Wrote Three Times To Ralph Kronig, With Whom He Had Cooperated A Little Earlier In Copenhagen On The Spectral Theory Of Multi-Electron Atoms. In The Second Letter, Dated 5 May, Heisenberg Wrote Down In Some Detailed Equations Expressing The Transition To His Matrix Mechanics. The Kramers?Kronig Relation For Dispersion Was Derived By Kronig (1926) Independently Of Kramers (1927). Kronig (1931, 1932), Published The First Theory Of X-Ray Absorption Fine Structure, Which Contained Some Of The Basic Concepts Of The Modern Interpretation. The Kronig-Penney Model (1931) Is A One-Dimensional Model Of A Crystal That Shows How The Electrons In A Crystal Are Dispersed Into Allowed And Forbidden Bands By Scattering From The Extended Linear Array Of Atoms. His First Theory (1931) Of Exafs Was The Three-Dimensional Equivalent Of This Model. The Theory Showed That A Photo Electron Traversing A Crystal Lattice Would Experience Permitted And Forbidden Zones Depending On Its Wavelength And, That Even When The Effect Was Averaged Over All Directions In The Lattice, A Residual Structure Should Be Observed. Thus Began The Long Record Of Publications In Which Kronig Structure Was Interpreted In Terms Of The Simple Kronig Theory. Until The 1970S Fully 2% Of The Papers Published In Phys. Rev. Were Devoted To X-Ray Absorption Spectroscopy And Most Invoked Kronig's Theory. The Short Range Order Data Of Hanawalt (1931B) Stimulated Kronig (1932) To Develop A Theory For Molecules. This Model Served As The Starting Point For All The Subsequent Short Range Order Theories. The Max Planck Medal Was Awarded To Ralph Kronig In 1962. From The Library Of Physicist Jan Korringa [Also A Student And Worker With Kramers] Who Wrote The Biographical Notes And Tables For The Textbook Of Physics Under The Editorship Of R. Kronig In Collaboration With J. De Boer.

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Détails bibliographiques

• Titre: Prospects And Dangers In An Age Of Science (Offprint From Det Kongelige Norske Videnskabers Selskabs Forhandlinger Bind 36, 1963)
• Éditeur: Kommisjon Hos F. Bruns Bokhandel, Trondheim Norway
• Date de parution: 1963
• Langue: anglais
• Reliure: Soft cover
• Édition: First Separate Edition
• État de l'article: Very Good
• Catalogues du vendeur:
  • Science (general)