In his 1905 paper, “On the Electrodynamics of Moving
Bodies,” Albert Einstein dealt with Michelson and
Morley’s observation that no shift in the speed of light
could be detected in any direction, even relative to the direction
of earth’s rotation or orbit.
This was the third of four papers that Einstein published in 1905.
The first helped begin quantum theory, “On a Heuristic
Viewpoint Concerning the Production and Transformation of
Light.” The second discussed Brownian motion and explained
atomic theory, “On the Motion of Small Particles Suspended
in a Stationary Liquid, as Required by the Molecular Kinetic
Theory of Heat.” The fourth established the equivalence of
matter and energy, E = mc2,
“Does the Inertia of a Body Depend Upon Its Energy
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