The deflexion of light and relativity

Abstract

In a recent paper, F. Freundlich and W. Ledermann have pointed out that "the question remains unsettled whether the light deflection at the sun's limb amounts to 1.75" as predicted by the Theory of Relativity or whether it is substantially larger, namely, equal to 2.2" as indicated by the findings of the Potsdam Expedition of 1929 and confirmed by a renewed discussion of previous observational material". The authors then proceed to discuss how an experiment can be planned to settle the question so that the standard deviation of the final result does not exceed 0.1".