Hans Reissner

Hans Reissner and his wife, Josefine.

Hans Jacob Reissner,^[1] also known as Jacob Johannes Reissner^[2] (18 January 1874, Berlin – 2 October 1967, Colton, Oregon), was a German aeronautical engineer whose avocation was mathematical physics. During World War I he was awarded the Iron Cross second class (for civilians) for his pioneering work on aircraft design.

Work

During the Third Reich Reissner was able to work in the aircraft industry although he did not have an Arierzeugnis. In 1938 he emigrated from the country to which he had contributed so much. He taught at the Illinois Institute of Technology (1938–44) and the Polytechnic Institute of Brooklyn (1944–54).

Curiously, it was this engineer, rather than a physicist or mathematician, who first solved Einstein's equation for the metric of a charged point mass.^[3] His Reissner–Nordström metric demonstrated that an electron has a naked singularity rather that an event horizon.

Eric Reissner (Max Erich Reissner, 1913–1996), his son, developed Mindlin–Reissner plate theory.^[4]

References

↑ Reissner, Eric. "Hans Reissner: Engineer, Physicist and Engineering Scientist" (PDF).
↑ "Ancestral File v4.19". FamilySearch. Retrieved July 2012. Check date values in: |access-date= (help)
↑ Reissner, H. (1916). "Über die Eigengravitation des electrischen Feldes nach der Einsteinschen Theorie". Annalen der Physik (in German). 50: 106. Bibcode:1916AnP...355..106R. doi:10.1002/andp.19163550905.
↑ "Eric Reissner". NNDB.

External links

Hans Reissner Papers MSS 30. Special Collections & Archives, UC San Diego Library.

Relativity

Special
relativity

Background	Principle of relativity Special relativity
Foundations	Frame of reference Speed of light Hyperbolic orthogonality Rapidity Maxwell's equations
Formulation	Galilean relativity Galilean transformation Lorentz transformation
Consequences	Time dilation Relativistic mass Mass–energy equivalence Length contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Relativistic disks
Spacetime	Light cone World line Spacetime diagram Biquaternions Minkowski space

General
relativity

Background	Introduction Mathematical formulation
Fundamental concepts	Special relativity Equivalence principle World line Riemannian geometry Minkowski diagram Penrose diagram
Phenomena	Black hole Event horizon Frame-dragging Geodetic effect Lenses Singularity Waves Ladder paradox Twin paradox Two-body problem
Equations	ADM formalism BSSN formalism Einstein field equations Geodesic equation Friedmann equations Linearized gravity Post-Newtonian formalism Raychaudhuri equation Hamilton–Jacobi–Einstein equation Ernst equation
Advanced theories	Brans–Dicke theory Kaluza–Klein Mach's principle Quantum gravity
Solutions	Schwarzschild (interior) Reissner–Nordström Gödel Kerr Kerr–Newman Kasner Taub–NUT Milne Robertson–Walker pp-wave van Stockum dust Weyl−Lewis−Papapetrou

Scientists

Einstein field equations:

G_{\mu \nu }+\Lambda g_{\mu \nu }={8\pi G \over c^{4}}T_{\mu \nu }

and their analytical solution by Ernst equation:

\displaystyle \Re (u)(u_{rr}+u_{r}/r+u_{zz})=(u_{r})^{2}+(u_{z})^{2}.

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