Edward d shirley biography of albert einstein
This document provides context for a collection of letters between Albert Einstein and children.
Albert Einstein is an icon of the twentieth century....
Michelson–Morley experiment
investigation of the speed of light
For interference experiments on matter, see Hughes–Drever experiment.
The Michelson–Morley experiment was an attempt to measure the motion of the Earth relative to the luminiferous aether,[A 1] a supposed medium permeating space that was thought to be the carrier of light waves.
The experiment was performed between April and July by American physicists Albert A. Michelson and Edward W. Morley at what is now Case Western Reserve University in Cleveland, Ohio, and published in November of the same year.[1]
The experiment compared the speed of light in perpendicular directions in an attempt to detect the relative motion of matter, including their laboratory, through the luminiferous aether, or "aether wind" as it was sometimes called.
The result was negative, in that Michelson and Morley found no significant difference between the speed of light in the direction of movement through the presum