Einstein-de Haas Effect
Publishes experimental work with Wander de Haas linking magnetism to angular momentum.
Albert Einstein · Year
1915
Albert Einstein records dated 1915, drawn directly from the World History Database source collection.
Return to General Covariance
Einstein abandoned key restrictions of the Entwurf approach and returned to generally covariant tensor equations, beginning the final rapid reconstruction of his gravitational theory.
Gottingen Relativity Lectures
Lectures in Gottingen on his gravitational theory, presenting the unfinished framework to leading mathematicians while he approaches the final generally covariant equations.
Revised Solar Deflection Reaches Full Relativistic Value
With the completed geometric treatment of gravity, Einstein obtained a solar light-deflection prediction approximately twice the value produced by his earlier equivalence-principle calculation.
Revised Solar Light-Bending Value
Using the completed theory, obtains the full gravitational deflection predicted for starlight grazing the Sun, approximately twice his earlier 1911 estimate.
November 4 Covariant Gravity Equations
Einstein presented new gravitational field equations to the Prussian Academy that restored much broader covariance and marked the first of his decisive November 1915 communications.
Restricted Covariance Equations
Presents revised gravitational field equations to the Prussian Academy during his final push toward general relativity.
November 11 Vacuum Field Equations
Einstein refined his field equations under a trace condition and showed how the revised framework could approach fully covariant gravitation in regions outside matter.
Second November Field Equations
Presents improved gravitational equations to the Prussian Academy and moves substantially closer to the generally covariant form completed later that month.
Unimodular Gravitation Equations
Presents another formulation of gravitation using a restricted coordinate condition with unit determinant.
Mercury Anomaly Reproduced without Adjustable Parameters
The relativistic Mercury calculation matched the anomalous perihelion advance using the gravitational theory itself rather than introducing an additional planet or an adjustable correction to Newtonian gravity.
Mercury Perihelion
Explains Mercury's anomalous perihelion advance using the emerging general theory of relativity.
November 18 Mercury Advance Calculation
Einstein used the emerging general theory to account for Mercury's unexplained perihelion advance, obtaining the observed residual shift that earlier gravitational models had failed to reproduce.
Final Generally Covariant Field Equations
Presents the final generally covariant gravitational field equations to the Prussian Academy, completing the mathematical core of general relativity.
General Relativity Field Equations
Presents the final generally covariant gravitational field equations to the Prussian Academy.
November 25 Matter-Coupled Field Equations
Einstein presented the final generally covariant field equations including their coupling to matter, completing the mathematical core of general relativity.
Zangger Letter Revisits Gravitational Lensing
Einstein mentioned the possibility of gravitational lensing in a letter to Heinrich Zangger, revisiting the double-image effect he had calculated in his 1912 notebook.
Göttingen Society Corresponding Membership
Elected a corresponding member of the Royal Society of Sciences at Göttingen.