Searching for the Deflection of Light
Einstein to George E. Hale, 14 October 1913, copy

When light is subject to the force of gravity, its rays must bend when close to massive objects. Einstein’s Entwurf Theory of 1913 predicts the results given here, whose values are too low. In the search for astronomical confirmation, Einstein turns to Hale, the Director of the Mount Wilson Observatory near Pasadena, California. In his answer, Hale believes that the daytime observation of stars, as Einstein proposed, is unfeasible.

[ Sitemap ] [ info ] This website was created by the MPI for the History of Science.