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Topic: Michelson-Morley experiment

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Michelson-Morley experiment - Wikipedia, the free encyclopedia The Michelson-Morley experiment, one of the most important and famous experiments in the history of physics, was performed in 1887 by Albert Michelson and Edward Morley at what is now Case Western Reserve University, and is considered by some to be the first strong evidence against the theory of a luminiferous aether. Michelson had made several measurements with an experimental device in 1881, in which he noticed that the expected shift of 0.04 was not seen, and a smaller shift of about 0.02 was. Morley was not convinced of his own results, and went on to conduct additional experiments with Dayton Miller. en.wikipedia.org /wiki/Michelson-Morley_experiment   (3230 words)

Michelson-Morley Experiment -- from Eric Weisstein's World of Physics Michelson and Morley were able to measure the speed of light by looking for interference fringes between the light which had passed through the two perpendicular arms of their apparatus. In 1895, Lorentz concluded that the "null" result obtained by Michelson and Morley was caused by a effect of contraction made by the ether on their apparatus and introduced the length contraction equation. Although Michelson and Morley were expecting measuring different speeds of light in each direction, they found no discernible fringes indicating a different speed in any orientation or at any position of the Earth in its annual orbit around the Sun. zyx.org /Michelson-MorleyExperiment.html   (545 words)

Michelson-Morley Experiment Michelson's terse description of the experiment: "The interpretation of these results is that there is no displacement of the interference bands. Michelson proceeded to invent a new instrument with accuracy far exceeding that which had been attained to that date, and that instrument is now universally called the Michelson interferometer. In 1878, Michelson had made an excellent measurement of the speed of light at the age of 25, and he thought the detection of motion through the ether might be measurable. hyperphysics.phy-astr.gsu.edu /hbase/relativ/mmhist.html   (852 words)

Michelson-Morley Experiment Michelson hoped, by rotating the interferometer, to detect the difference between a velocity of (.0001 c)(1,0,0) and a velocity of (.0001 c)(0,1,0), i.e., between the earth moving about the sun at a speed of.0001 c with the interferometer first positioned parallel and later positioned perpendicular to this motion. Michelson is completely oblivious to the fact that, on the wave theory of light, the half of the light that is reflected back toward the source will set up standing waves with the light coming from the source, which will change the phase relationships of the light inside the interferometer. Michelson’s calculation of the expected fringe shift assumes that the right and top mirrors are equally distant from the central mirror, so that rotating the interferometer 90o merely interchanges the roles of the reflected and transmitted ray. home.att.net /~zei/TMKelso/Newtonian_Physics_Problems.htm   (5080 words)

SHiPS Resource Center The Michelson-Morley Experiment Michelson and Morley could report only that the relative speed of the Earth and ether was less than one-sixth the velocity of the Earth—enough to discount Fresnel's explanation once again, but not enough to dispense with an ether wind altogether. Michelson received a Nobel Prize in 1907, but his now acclaimed experiments were not a part of the citation. Instead, Michelson was acknowledged for his instruments—for example, the interferometer's contribution to establishing a new standard for defining the meter, through the velocity of light. www1.umn.edu /ships/updates/m-morley.htm   (1186 words)

Michelson Morley, Physics: WSM explains Michelson Morley, Null Result of Michelson Morley Experiment The results of all these facts and experiments, except for one, the Michelson Morley experiment, were explained by H.A. Lorentz on the assumption that the ether does not take part in the motion of ponderable bodies, and that the parts of the ether have no relative motions at all with respect to each other. To explain the Michelson Morley experiment, we need simply say that there is no Absolute Space / Absolute Reference Frame thus there there is no difference between the velocity of the light source and the velocity of the observer. Although the estimated difference between these two times is exceedingly small, Michelson and Morley performed an experiment involving interference in which this difference should have been clearly detectable. www.spaceandmotion.com /Physics-Michelson-Morley.htm   (12876 words)

The Michelson and Morley Experiment. From Einstein Light The Michelson Morley experiment supports Einstein's principle of relativity, as the introductory film clip shows. Michelson, A.A. and Morley, E.W. (1887) "On the relative motion of the earth and the luminiferous ether", Am. Like Michelson and Morley, researchers usually look for differences in the speed in different direction. www.phys.unsw.edu.au /einsteinlight/jw/module3_M&M.htm   (838 words)

michelson morley english The key point to understanding Michelson's experiment is : "the speed of the new photons of light leaving the mirrors will be by rule at "c" the universal constant relatively to the mirror's atoms". The purpose of the experiment was to detect the movement of the earth through ether. Michelson than obtained something he was not expecting. www.astrosurf.com /miroir_grav/michelsona.htm   (941 words)

Einstein Exhibit -- E=mc2 Michelson and Morley expected to see their light beams shifted by the swift motion of the earth in space. One of the most striking, in retrospect, was done in Cleveland, Ohio, by Albert Michelson and Edward Morley in 1887. It is debatable whether Einstein paid heed to this particular experiment, but his work provided an explanation of the unexpected result through a new analysis of space and time. www.aip.org /history/einstein/emc1.htm   (435 words)

Michelson-Morley experiment --  Encyclopædia Britannica First performed in Berlin in 1881 by the physicist A.A. Michelson, the test was later refined in 1887 by Michelson and E.W. Morley in the United States. Michelson, Albert A. One of the world's most distinguished physicists, Albert A. Michelson established the speed of light as a fundamental constant, devised a method of making unprecedentedly accurate distance measurements using the length of light waves, and pursued other spectroscopic and meteorological investigations. Michelson, A.A. German-born American physicist who established the speed of light as a fundamental constant and pursued other spectroscopic and metrological investigations. www.britannica.com /eb/article-9052479   (800 words)

The Michelson Morley Experiment In the Michelson-Morley Experiment it is believed that a null result "proves" that the velocity of light is the same in both directions, as measured in the moving frame. That is the half-transparent mirror, at 45 degrees, in the Michelson-Morley experiment. It is generally believed that the Michelson-Morley Experiment is a test to verify whether light takes the same time to travel an equal distance along the direction www.newtonphysics.on.ca /faq/Michelson-Morley.html   (605 words)

Michelson Morley experiment interpretation by Astrojan The Michelson experiment not suitable to detect the so called aether wind. experiments was fundamentally wrong, because as long as the red light goes against the aether wind, the blue one goes before the wind. The experiment was planned for the detection of aether wind at the end of 19th century by www.biochem.szote.u-szeged.hu /astrojan/aether.htm   (287 words)

Ether and the Michelson-Morley Experiment The Michelson-Morley experiment played an important role in Einstein's special theory of relativity. When Michelson and Morley detected no such seasonal variation in the speed of light, the ether hypothesis had to be abandoned. This is completely counter-intuitive with everyday experiences, where the observed speed of an object depends on whether one is moving toward or away from it and depends on whether the "thrower" of the object is in motion. www.jupiterscientific.org /sciinfo/ether.html   (203 words)

The Michelson-Morley Experiment As a result of Michelson's efforts in 1879, the speed of light was known to be 186,350 miles per second with a likely error of around 30 miles per second. Michelson's great idea was to construct an exactly similar race for pulses of light, with the aether wind playing the part of the river. The scheme of the experiment is as follows: a pulse of light is directed at an angle of 45 degrees at a half-silvered, half transparent mirror, so that half the pulse goes on through the glass, half is reflected. galileoandeinstein.physics.virginia.edu /lectures/michelson.html   (3672 words)

The Michelson-Morley experiment and SR The Michelson-Morley experiment and SR Name: Tero Salomaa Interesting is, that the original experiment done by Michelson in 1887 was obviously done in the air and the null result was still concluded, which lead to SR. But who has Michelson interferometer for use, can do steps (i) and (ii) and report what happens (instead of air it can be used for example water as medium to make result more observable). www.mrelativity.net /discussion/_disc/0000000a.htm   (180 words)

Michelson-Morley Experiment To make our animation look more like the expected outcome of the original experiment, we have cheated by not taking into account the effect of the aether wind on the direction of motion of the light, but only including its effect on the speed of the light. The point of this animation is to illustrate the idea behind M & M's experiment, not to give a quantitative representation. So the ratio of light speed to aether speed as portrayed here cannot be anywhere near 10,000, the order of magnitude M & M expected to find. galileoandeinstein.physics.virginia.edu /more_stuff/flashlets/mmexpt6.htm   (193 words)

Michelson and Morley's Experiment The result of both effects is the same: the Michelson and Morley's experiment is not a function of the speed v of the Earth. The purpose of the Michelson and Morley's experiment is to detect if the speed of light is a function of the speed v of the Earth. On the other hand because the final outcome of the experiment is that the setup is independent of v (which is not known) it is not possible which of the arms is actual contracting (or expanding). users.telenet.be /nicvroom/mmx_exp.htm   (884 words)

The Michelson Morley Experiment The Michelson Morley experiment was designed to detect any movement of the earth through the aether. In collaboration with Morley, Michelson built on interferometer on a block of stone 1.5 metres square and 25cm thick which floated on mercury. Michelson and Morley's apparatus would need to detect one part in one hundred million (10 users.powernet.co.uk /bearsoft/MickM.html   (595 words)

Michelson and Morley's experiment Michelson and Morley mounted their apparatus on a stone block floating in a pool of mercury, and rotated it to seek changes in relation to the motion of the earth in its orbit around the sun. Image: A. Michelson and E. Morley, "On the Relative Motion of the Earth and the Luminiferous Ether," American Journal of Science, 34, 333-345 (1887). Other experiments on the speed of light also produced results contrary to what physicists expected. www.aip.org /history/einstein/ae20.htm   (171 words)

Special Theory of Relativity Gerald Holton, "Einstein, Michelson and the 'Crucial' Experiment," which has appeared in Thematic Origins of Scientific Thought, pg. In is ironic that Michelson himself wrote in 1899, "The more important fundamental laws and facts of physical reality have all been discovered and they are now so firmly established that the possibility of their ever being supplanted in consequence of new discoveries is exceedingly remote.... She experiences high g-forces when she blasts off, experiences yet others when reaches Alpha Centauri and turns around, and yet again when she decelerates and lands on the Earth at the end of her trip. www.upscale.utoronto.ca /GeneralInterest/Harrison/SpecRel/SpecRel.html   (9264 words)

The Overlooked Phenomena in the Michelson-Morley Experiment We have shown here that, in the Michelson-Morley experiment, using classical physics, the time for light to travel between any pair of mirrors, in any direction, is always the same, independently of the direction of the moving frame and also independently of having light moving either parallel or transverse to the frame velocity. We show that Michelson and Morley used an over simplified description and failed to notice that their calculation is not compatible with their own hypothesis that light is traveling at a constant velocity in all frames. The phenomenon of reflection on moving mirrors ignored by Michelson and Morley produce an effect, which is exactly equal to the difference of time, and which was erroneously interpreted as an agreement with relativity in modern physics. www.newtonphysics.on.ca /michelson/michelson.html   (6712 words)

QOM Research Michelson-Morley Experiment For the MM experiment [1,2] we operated two sapphire COREs inside a cryostat at T = 4 K (vacuum), one oriented east-west the other north-south. To avoid fluctuations of the incoupling to the resonators an active beam pointing stabilization was applied. Ligth from two Nd:YAG lasers at 1064 nm was coupled into the cavities from outside through windows. qom.physik.hu-berlin.de /research_mm.htm   (632 words)

Dayton Miller's Ether-Drift The experiment is designed to detect a very minute effect on the velocity of light, to be impressed upon the light through the ether itself, and it would seem to be essential that there should be the least possible obstruction between the free ether and the light path in the interferometer. His experiments yielded systematic periodic effects which pointed to a similar identifiable axis of cosmic ether-drift, though of a variable magnitude, depending upon the season, time of day, density of materials shielding or surrounding the apparatus, and altitude at which the experiment was undertaken. Michelson went to his grave convinced that light speed was inconstant in different directions, and also convinced of the existence of the ether. www.orgonelab.org /miller.htm   (10295 words)

Michelson-Morley Experiment Over a period of about 50 years, the Michelson-Morley experiment was repeated with growing levels of sophistication. The overall result is a high level of confidence that the wavelength shift is consistent with zero. hyperphysics.phy-astr.gsu.edu /hbase/relativ/morley.html   (34 words)

Michelson and Morley’s Experiment Michelson and Morley’s experiment was designed to test whether or not the ether sweeps light along with it. This would be the case for the vertical axis relative to the surface of the earth. It was set up as an interferometer using two light paths at right angles. home.earthlink.net /~chkingston/Michelson.htm   (288 words)

Relativity Michelson and Morley repeated their experiment many times up until 1929, but always with the same results and conclusions. The result of the Michelson-Morley experiment was that the speed of the Earth through the ether (or the speed of the ether wind) was zero. Therefore, this experiment also showed that there is no need for any ether at all, and it appeared that the speed of light in vacuum was independent of the speed of the observer! nobelprize.org /physics/educational/relativity/experiment-1.html   (193 words)

Anti Relativity : Michelson Morley failed experiment changes everything Here is a good explanation of the experiment as it is generally accepted by the masses. Unfortunately, the problem lies in the expectation that this experiment held in a basement would be able to detect the motion of Aether. Dayton Miller's experiments and likely not true in others when we see it in the light of all the evidence. www.anti-relativity.com /mmx.htm   (1764 words)

Michelson-Morley Experiment The Michelson-Morley experiment was a precision measurement which showed that the speed was independent of the relative motion of the observer. For a detailed explanation of the Michelson-Morley experiment see Claustrophobic Physics Michelson-Morley experiment. This then suggested that the speed of light is independent of the observer, and formed one of the postulates of the special theory of relativity. www.mta.ca /faculty/Courses/Physics/4701_97/EText/MinkowskiTensor.html   (271 words)

Uncertain Principles An extremely large Michelson interferometer (with arms kilometers long) is the center of the LIGO (Laser Interferometer Gravity-wave Observatory) project, looking for small wiggles in the fabric of space due to cataclysmic astronomical events. The device he used, now known as a Michelson interferometer, consists of a beam of light split into two beams which are sent off at right angles to one another, then brought back together and re-combined. Mechanics and Maxwell's equations are completely incapable of describing phenomena on an atomic scale, and experiments were being done in the late 1800's that would lead to the revolution of quantum mechanics. www.steelypips.org /principles/2002_09_15_principlearchive.php   (4784 words)

The Michelson-Morley Experiment They like to discuss in great detail the absolute surety that Albert Michelson and Edward Morley approached their experiment with, that they were convinced they would prove the existence of the aether, that theorized ubiquitous medium that had to exist for light waves to move. After having made sure that every step of their reasoning is understood conceptually and mathematically, physics teachers then like to declare that the experiment detected no such lag and that everything just said was wrong. They also delight in having students remember every step of the experiment -- how the interferometer was set up, exactly what the expected lag time of light impeded by the aether should be. improbable.org /era/physics/aether.html   (282 words)

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