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1905 CEPrimary source · 2 sourcesWell documented

Einstein Publishes His Annus Mirabilis Papers, Including Special Relativity

A Swiss patent clerk rewrites space, time, mass, and energy in a single extraordinary year

On the timeline · around 1905 CE · The Quantum and Relativity RevolutionClassical PhysicsThe Quantum and Relativity RevolutionEinstein Publishes His Annus Mirabilis Papers, Including Special Relativity18601880190019101920

Quick facts

Year
1905 (the annus mirabilis)
Papers
Photoelectric effect, Brownian motion, special relativity, mass-energy equivalence
Nobel recognition
1921 Nobel Prize in Physics, for the photoelectric effect
Key equation
E = mc^2

What happened

In 1905, while working as a patent examiner in Bern, Albert Einstein published four papers in Annalen der Physik that transformed physics. The first, examining the phenomenon Max Planck had discovered, treated light itself as arriving in discrete quanta, an idea that explained the photoelectric effect and would later win Einstein the 1921 Nobel Prize in Physics, awarded not for relativity but for this work. A third paper addressed statistical mechanics and Brownian motion, the erratic jostling of small particles suspended in a fluid, in a field previously studied by Ludwig Boltzmann and Josiah Gibbs. His second 1905 paper proposed what MacTutor calls his most consequential result: the special theory of relativity, built on the idea that the introduction of a light-ether will prove to be superfluous, that the laws of physics look the same in every uniformly moving reference frame, and that the speed of light in a vacuum is constant for every observer. Later that same year, in a short separate paper, Einstein showed how mass and energy were equivalent, the relationship expressed as E=mc^2.

Why it matters

In roughly seven months of a single year, a physicist working outside any university produced the foundations of quantum theory's photon concept, statistical proof that atoms are physically real, and a wholesale replacement for Newtonian space and time, three results any one of which would have made a career. Special relativity discarded the idea of an absolute, universal time and set the stage for general relativity a decade later.

How we know

All four 1905 papers were published in the German physics journal Annalen der Physik and survive in their original form; MacTutor's biography of Einstein documents their content, submission dates, and reception directly from this published record.

Sources

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