Escaping Photon Used to Challenge Energy-Time Uncertainty
Einstein argued that measuring the mass loss of a timed photon box could in principle determine both the photon's energy and its emission time more precisely than quantum uncertainty allowed.
Albert Einstein · Year
1930
Albert Einstein records dated 1930, drawn directly from the World History Database source collection.
Exact Static Unified-Field Solutions
Publishes work with Walther Mayer giving exact static solutions of unified-field equations, testing whether the programme can represent physically meaningful configurations.
First Caltech Winter Visit
Begins an extended academic visit to the California Institute of Technology.
Photon Box Thought Experiment Presented
At the Solvay Conference Einstein proposed a box-and-clock thought experiment intended to challenge the energy-time uncertainty relation by weighing a box before and after a photon escaped.
Riemann Metric and Distant Parallelism
Further develops spaces combining a Riemann metric with distant parallelism, refining the geometric machinery behind his teleparallel unified-field theory.
Sixth Solvay Conference
Attends the sixth Solvay Conference and continues discussions on quantum theory and field physics.
Unified Field Equation Compatibility
Examines the compatibility of equations in the unified-field programme, addressing mathematical consistency before the theory can be regarded as physically viable.
ETH Zurich Honorary Doctorate
Receives an honorary Doctor of Science degree from ETH Zurich.
Caltech Relativity and Cosmology Visit
Begins an extended visit to Caltech where relativity, cosmology and unified-field questions form an important part of his discussions with American physicists and astronomers.