Caption: New Zealander Roy Kerr (1934--) lectures at the 11th Marcel Grossmann Meeting (in honor of Marcel Grossmann (1878--1936)) in Berlin, 2006
Kerr is the discoverer (in 1963) of the Kerr solution for the Einstein field equations for the spacetime outside a rotating spherically-symmetric body. The Kerr solution predicts the existence of Kerr black holes.
In the image, Kerr is using an overhead projector, an obsolete kind of projector---you still see a few of them gathering dust in the odd corners of classrooms.
Credit/Permission: ©
Martin Petrasek
(AKA User: Martincz), 2006 /
Creative Commons
CC BY-SA 3.0.
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