March 20
Einstein Submits General Theory of Relativity Paper
In the midst of World War I, Albert Einstein delivered the detailed mathematical framework that recast gravity as the curvature of spacetime itself.
Summary
Albert Einstein had developed special relativity a decade earlier but struggled to extend it to gravity and accelerated frames. Building on mathematical work by colleagues including Marcel Grossmann and David Hilbert, he formulated a geometric theory of gravity using curved spacetime. On March 20, 1916, Einstein submitted the foundational paper "The Foundation of the General Theory of Relativity" to the journal Annalen der Physik. The work presented the Einstein field equations describing how matter and energy curve spacetime, predicting phenomena like gravitational lensing and the bending of starlight during solar eclipses. It marked the culmination of years of intense effort amid World War I disruptions in Europe.
Context
By 1916, Albert Einstein had already transformed physics a decade earlier with his special theory of relativity, which unified space and time for observers in uniform motion but left gravity and accelerated frames outside its scope. Newtonian gravity, long the accepted description of attraction between masses, proved incompatible with the new relativistic worldview, prompting Einstein to search for a more general theory. His efforts drew on the equivalence principle, first articulated around 1907, which posited that the effects of gravity are locally indistinguishable from those of acceleration.
What Happened
Working in Berlin under the disruptions of wartime shortages and limited international communication, Einstein refined his ideas with help from mathematician Marcel Grossmann on the necessary tensor calculus and engaged in correspondence with David Hilbert, who pursued a parallel variational approach to the field equations. After months of intense calculation and revision to achieve general covariance, he completed a lengthy manuscript that presented the Einstein field equations linking the geometry of spacetime to the distribution of matter and energy. On March 20, 1916, he submitted the paper titled "The Foundation of the General Theory of Relativity" to the editors of Annalen der Physik for publication.
Aftermath
The manuscript appeared in the journal later that year as a comprehensive 50-page exposition, providing the first full account of the theory's predictions, including the deflection of light by massive bodies. Colleagues in Germany and abroad began studying the equations, though wartime conditions slowed wider dissemination and experimental tests.
Legacy
The general theory supplanted Newtonian gravity as the standard description of large-scale phenomena and supplied the foundation for modern cosmology, the study of black holes, and technologies such as satellite navigation systems that must account for spacetime curvature. Its confirmation through observations like the 1919 solar eclipse expedition cemented Einstein's reputation and redirected physics toward geometric interpretations of natural laws.
Why It Matters
The theory revolutionized physics, replacing Newtonian gravity and enabling predictions confirmed by observations such as the 1919 eclipse expedition. It underpins modern cosmology, GPS technology, and black hole research, fundamentally altering humanity's understanding of the universe's structure.
Related Questions
How did special relativity differ from the general theory Einstein submitted in 1916?
Special relativity handled uniform motion and omitted gravity, while the general theory incorporated accelerated frames and described gravity through spacetime curvature.
What role did Marcel Grossmann play in Einstein's work?
Grossmann supplied crucial expertise in differential geometry and tensor calculus that allowed Einstein to express his physical ideas mathematically.
Why was the 1916 paper considered foundational despite earlier 1915 presentations?
It offered the first complete, self-contained exposition of the theory, including detailed derivations and predictions suitable for broader study and testing.
How did World War I affect the development and reception of the theory?
Isolation limited collaboration and delayed experimental verification, yet Einstein continued his work in Berlin and the paper reached print despite wartime constraints.
What everyday technology relies on Einstein's general theory today?
Global positioning systems must correct for relativistic effects on satellite clocks caused by Earth's gravity and motion.
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Sources
- March 20, Wikimedia Foundation. Accessed 2026-07-09.