See Also: Michelson-Morley(dictionary)
Michelson-Morley experiment(encyclopedia)
Morley (of Blackburn), John Morley, Viscount(encyclopedia)
Michelson(dictionary)
Michelson, A(lbert) A(braham)(encyclopedia)
Morley, Thomas(encyclopedia)
Morley (as used in expressions)(encyclopedia)
Callaghan, Morley (Edward)(encyclopedia)

Michelson-Morley (iou)



Michelson-Morley noun. E20.
[from MICHELSON + E. W. Morley (1838-1923), US chemist and physicist.]
Physics. Used attrib. to designate an experiment performed in 1887 in which a beam of light was divided and made to travel over two paths, parallel and perpendicular to the earth's motion, before being recombined, the behaviour of the resulting interference fringes showing that the speed of light was the same in both directions, contrary to the notion that the earth moves through an ether.