Michelson–Morley experiment - Simple English …

T.The Michelson and Morley 1887 Experiment and the Discovery of AbsoluteMotion [  ]

Michelson-Morley: Detecting the Ether Wind Experiment

The isregarded as the electrostatic equivalent of the Michelson–Morleyoptical experiment, though whether or not it can ever be done withthe necessary sensitivity is debatable. On the other hand, the 1908,which can be regarded as the electrical equivalent to the , achieved an incredible sensitivity.

Thus, the Michelson - Morley experiment doesnot witness the light speed constancy and does not testify against any classicalprinciples.

The Famous Michelson & Morley Experiment - Space …

The Michelson–Morley experiment was conducted in 1887 by two American scientists, Albert Michelson and Edward Morley in Case Western Reserve University, a private University in Cleveland, Ohio. The results of the experiments are basically thought to be the first strong evidence against the theory of a luminiferous aether. The experiment has also been referred to as "the moving-off point for the theoretical aspects of the Second Scientific Revolution”. In the late 19th century, luminiferous aether or ether, meaning -bearing aether, was the term used to describe a medium for the propagation of . Also spelled aether or ether, it is the material that was thought to fill the entire region of the . The word aether originated through , meaning to kindle, burn, or shine. It signifies the substance which was thought in ancient times to contain the manipulative forces beyond control.

The Famous Michelson & Morley Experiment

However, the Michelson-Morley experiments, and some other ones, try todetermine light speed as a mean velocity for two mutually oppositedirections (for a closed path).

01/12/2011 · Michelson & morley experiment ..


Michelson-Morley experiment | Science versus Truth | …

This is similar to (above), but the lasers arefixed to the Earth for better stability. No variations were found at the level of2×10−13. As they made observations over a year, this is not merely alimit on anisotropy, but also a limit on variations in different inertial frames. Brilletand Hall corresponds roughly to the Michelson-Morley experiment (no variations of theround-trip speed of light in different directions, with a time-scale of minutes orseconds); Hils and Hall corresponds roughly to the Kennedy-Thorndike experiment (novariations of the round-trip speed of light in different directions or for the differentinertial frames occupied by the Earth during a year or so).

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In 1887, physicists Alfred Michelson and Edward Morley set up an array of prisms and mirrors in an elegant attempt to measure the passage of the Earth through what was then known as “luminiferous ether” – a mysterious substance through which light waves were believed to propagate, like sound waves through air.

Michelson–Morley experiment Research Papers - …

The device which was designed by Michelson for detecting the aether flow accurately was known as an 'interferometer'. The device sent a single source of white through a half-silvered mirror that was used to split it into two travelling at right angles to one another. After leaving the splitter, the travelled out to the ends of long arms where they were reflected back into the middle on small mirrors. They then recombined on the far side of the splitter in an eyepiece, producing a pattern of constructive and destructive interference (addition of two or more waves that results in a new wave pattern) based on the spent time to transit the arms. If the Earth is traveling through an ether medium, a reflecting back and forth parallel to the flow of ether would take longer than a reflecting perpendicular to the ether because the time gained from traveling downwind is less than that lost traveling upwind.

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The Michelson-Morley experiment (MMX) was intended to measure the velocity of the Earthrelative to the “lumeniferous aether” which was at the time presumed to carryelectromagnetic phenomena. The failure of it and the other early experiments to actuallyobserve the Earth's motion through the aether became significant in promoting theacceptance of Einstein's theory of Special Relativity, as it was appreciated from early onthat Einstein's approach (via symmetry) was more elegant and parsimonious of assumptionsthan were other approaches (e.g. those of Maxwell, Hertz, Stokes, Fresnel, Lorentz, Ritz,and Abraham).