Scientists / Physics
アルベルト・アインシュタイン
DE 1879-03-14 ~ 1955-04-18
German-born theoretical physicist of the twentieth century
Rewrote the understanding of space, time, and gravity through special and general relativity
A symbol of scientific imagination who wielded thought experiments to overturn established physics
German-born physicist whose special and general relativity rewrote the understanding of space, time, and gravity. Won the 1921 Nobel Prize for the photoelectric effect.
What You Can Learn
Einstein's thought experiments model hypothesis building when hard data is scarce, a skill central to lean startups and early-stage product design. His revolutionary papers, written outside academia while employed as a patent clerk, anticipate the value of side projects and the twenty-percent-time concept. His unfinished quest for a unified theory shows the worth of holding a bold long-term vision even without short-term payoff, a lesson for R&D strategy and patient capital.
Words That Resonate
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
God does not play dice with the universe.
The important thing is not to stop questioning. Curiosity has its own reason for existing.
If you can't explain it simply, you don't understand it well enough.
Life & Legacy
Albert Einstein effected the deepest conceptual revolution in twentieth-century physics. His theories of relativity overturned the absolute time and space assumed since Newton, showing both to be relative quantities shaped by motion and gravity.
Born in 1879 in Ulm, Germany, he grew up in Munich and taught himself Euclidean geometry at twelve. After clashing with his Gymnasium's rigidity, he moved to Switzerland and enrolled at the Zurich Polytechnic, where friendships with Marcel Grossmann and others grounded his training.
The annus mirabilis of 1905 came while he worked as a patent examiner in Bern. Four papers reshaped physics: the photoelectric effect (proposing light quanta), Brownian motion, special relativity, and mass-energy equivalence (E = mc2). Special relativity, starting from the constancy of light speed, yielded time dilation and length contraction.
General relativity, completed in 1915, cast gravity as spacetime curvature. Eddington's 1919 eclipse observations confirmed the predicted bending of starlight and made Einstein world-famous. Gravitational waves, black holes, and cosmic expansion all flow from the theory; verification continues today.
His signature method was the thought experiment. What would the world look like at light speed? What does a passenger feel in a free-falling elevator? From such questions he built rigorous mathematics. Yet he opposed quantum-mechanical probability to the end, insisting "God does not play dice."
The 1921 Nobel Prize honored the photoelectric effect, not relativity, reflecting lingering debate. In 1933 he fled the Nazis for Princeton's Institute for Advanced Study. His 1939 letter to Roosevelt about nuclear fission helped trigger the Manhattan Project, though he played no direct part in the bomb. He spent his final years pursuing a unified field theory, dying in Princeton in 1955 with the quest incomplete.
Expert Perspective
Among scientists, Einstein holds a singular position as the physicist who subsumed Newtonian mechanics into a deeper framework. His reliance on thought experiments and mathematical deduction, rather than laboratory work, sets him apart from contemporaries like Bohr and Heisenberg. That one theorist contributed special relativity, general relativity, the light-quantum hypothesis, and the theory of Brownian motion is without parallel in twentieth-century physics.