Accelerated Clock Rate Argument
Using accelerated reference frames, Einstein concluded that clocks at different gravitational potentials should not run at identical rates, linking gravity directly with the measurement of time.
Albert Einstein · Year
1907
Albert Einstein records dated 1907, drawn directly from the World History Database source collection.
Accelerated Frames and Gravitation
Extends special-relativistic reasoning to accelerated motion and concludes that gravitation must alter measurements of time, frequency and the propagation of light.
Equivalence Principle
Recognises that a uniformly accelerated frame is locally equivalent to a homogeneous gravitational field, establishing the conceptual starting point for general relativity.
Free-Fall Frame Insight for Gravitation
Einstein recognised that an observer in sufficiently small free fall can describe local physics without an apparent gravitational force, an insight that became central to his equivalence principle.
Gravitational Redshift
Predicts that gravity should shift the frequency of light, later called gravitational redshift.
Gravity and Light Propagation from Equivalence
Einstein's equivalence reasoning implied that a gravitational field must influence light propagation, opening a path from special relativity toward a relativistic theory of gravitation.
Quantum Theory of Specific Heat
Applies quantum ideas to the specific heat of solids, an early success of quantum theory.