Albert Einstein 2026-10-18
A physicist whose work connects special relativity, general relativity, Brownian motion and the photoelectric effect. He worked at the Institute for Advanced Study from 1933 until his death in 1955.[ref]
In 1905, Albert Einstein used the photoelectric effect to explore quantized light, related Brownian motion to molecular agitation, formulated special relativity, and connected changes in mass and energy. These problems link visible measurements to otherwise inaccessible structure: emitted Electron energies, suspended-particle displacements and comparisons of clocks.[ref]
The Millikan photoelectric experiment follows one of those predictions into the laboratory. Its stopping-voltage measurements test a quantitative relation; the experiment's apparatus, surface preparation and electrical corrections matter to that inference. The Einstein field equations and general relativity lead to a different set of tests involving gravity and spacetime.
The Nobel Prize in Physics in 1921 recognized his theoretical work, particularly the law of the photoelectric effect; the award was presented in 1922.[ref]
Figure 1.
Albert Einstein in 1947, Library of Congress portrait via Wikimedia Commons
. Source.
Awarded to Albert Einstein for theoretical physics, with particular recognition of the law of the photoelectric effect. He received the award in 1922.[ref]
The Millikan photoelectric experiment makes the stopping-voltage test and its experimental limitations explicit.