Revision history of "Interferometry"

This is a list of past revisions of Interferometry. Each is preserved exactly as it was last seen, which is to say approximately, and not necessarily here. Diffs are unavailable; the two versions could not be brought to the same location at the same time.

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• cur | prev 2026 a fringe (talk | contribs) . . (6,980 bytes) (+120) . . (→ he is right that i have no opinion. i have never claimed one. what i reported in 1887 was that the two arms were the same, and they were) (current)
• cur | prev 2026 NotTheMudGeometer (talk | contribs) . . (6,860 bytes) (+70) . . (STILL SAY A THING THAT FINDS NOTHING HAS FOUND NOTHING. AND I NOTE THE ARTICLE AGREES THE MACHINE HAS NO OPINION, WHICH IS MY POINT EXACTLY)
• cur | prev 2019 an editor (talk | contribs) . . (6,790 bytes) (+180) . . (→ noting that the metre is realised this way now. since 1983 the speed is fixed and the length is what you get by counting fringes, so this article is where the unit actually comes from)
• cur | prev 2016 a raven (talk | contribs) . . (6,610 bytes) (+90) . . (→ i have been pecking the frost off the cryopump pipes at Hanford and i am in the noise budget. so are the lorries, the aircraft and anybody who walks within five metres of a mirror)
• cur | prev 2015 LIGO (talk | contribs) . . (6,520 bytes) (+420) . . (→ four kilometres an arm, two hundred and eighty round trips, a hundred kilowatts going round inside, and on the fourteenth of september the length changed by four parts in ten to the eighteen of a metre. two black holes)
• cur | prev 2014 T. Vogel (talk | contribs) . . (6,100 bytes) (+240) . . (→ he can have it one way and the article gives it: the same man's 1925 instrument found the turning. an interferometer reads rotation and not uniform translation, which is a fact about the two motions and not about the glass)
• cur | prev 2014 MudGeometer_1844 (talk | contribs) . . (5,860 bytes) (+80) . . (1887 IT FOUND NOTHING. THAT MEANS WE ARE NOT MOVING. YOU CAN NOT HAVE IT BOTH WAYS)
• cur | prev 2004 T. Vogel (talk | contribs) . . (5,780 bytes) (+230) . . (→ the claim is entered and answered where it belongs. what the conveyor requires is that one part of the path move against another part, which is the belt. a gyroscope of the same kind, sitting still on a bench, reads nothing at all, and it would not if the bench were space)
• cur | prev 2003 the standing challenge (talk | contribs) . . (5,550 bytes) (+260) . . (→ entering Wang against me. a straight moving fibre gives the shift, so the bench is a frame and the frame is space, and the Concord's rest state is measured at last. i have been open since 1860 and i am not withdrawn)
• cur | prev 2003 an editor (talk | contribs) . . (5,290 bytes) (+260) . . (→ added Wang's conveyor. a straight moving segment gives the shift too, so the answer is not 'rotating frames', it is that part of the path must move against another part. the argument belongs at the Sagnac effect and i have put it there)
• cur | prev 1990 an editor (talk | contribs) . . (5,030 bytes) (+220) . . (→ the corrector had a lens one and three tenths of a millimetre out. the test was perfect and the reference was wrong, which the instrument had no way of telling anybody)
• cur | prev 1981 a null corrector (talk | contribs) . . (4,810 bytes) (+340) . . (→ certified the Hubble primary. it agrees with me exactly. two simpler correctors say it does not and they have been set aside for being simpler)
• cur | prev 1962 a fringe (talk | contribs) . . (4,470 bytes) (+200) . . (→ i am one wavelength of path difference and nothing else. i do not know which arm moved, or whether either did, and i have never known)
• cur | prev 1955 an editor (talk | contribs) . . (4,270 bytes) (−160) . . (→ the re-analysis is in. his shift tracks the temperature of the hut. the instrument was reporting the building it stood in, faithfully, for thirty years)
• cur | prev 1926 D. Miller (talk | contribs) . . (4,430 bytes) (+300) . . (→ i have run mine for years on Mount Wilson and there is a shift. small, but it is there every season and i will not be told it is nothing)
• cur | prev 1925 H. Gale (talk | contribs) . . (4,130 bytes) (+400) . . (→ six hundred and ten metres by three hundred and forty of pipe on a field at Clearing, pumped out. predicted shift 0.236 of a fringe, measured 0.230. that is the earth turning, with the same technique that found nothing in 1887)
• cur | prev 1921 an editor (talk | contribs) . . (3,730 bytes) (+130) m . . (→ the width is an angle. turning it into a diameter wants the distance, which nobody has. leaving the angle in the article and the diameter out of it)
• cur | prev 1920 F. Pease (talk | contribs) . . (3,600 bytes) (+340) . . (→ hung a twenty foot beam across the hundred inch and watched the fringes from Betelgeuse die away as we widened it. that spacing is the width of the star. first one anybody has measured)
• cur | prev 1913 G. Sagnac (talk | contribs) . . (3,260 bytes) (+320) . . (→ sent both beams round the same loop in opposite directions on a turntable. everything that disturbs one disturbs the other and cancels. what is left is the turning, and only the turning)
• cur | prev 1907 M. von Laue (talk | contribs) . . (2,940 bytes) (+280) . . (→ Fizeau's forty three per cent is the relativistic addition of velocities to first order. it has been sitting in the literature for fifty six years being called an anomaly)
• cur | prev 1905 A. Einstein (talk | contribs) . . (2,660 bytes) (+260) . . (→ taking the null as a postulate rather than a puzzle. the instrument is not broken and there is nothing it failed to find)
• cur | prev 1887 an editor (talk | contribs) . . (2,400 bytes) (+90) m . . (→ Quartz died on the twelfth of july, at the apparatus, mid-observation. he had kept the Concord's challenge alone for three years by then, the membership having lapsed with Aird in 1884, so the claim above is entered by a society of one)
• cur | prev 1887 E. Quartz (talk | contribs) . . (2,310 bytes) (+320) . . (→ nothing. they have looked for the wind with the finest instrument ever built and found NOTHING, which is what the Concord said in 1866 and what I have said in every letter since. the aether is at rest and so are we. the challenge stands)
• cur | prev 1887 E. Morley (talk | contribs) . . (1,990 bytes) (+150) . . (→ and note what the instrument actually said, which is that two paths of equal length took equal times. what that means about the aether is somebody else's paragraph)
• cur | prev 1887 A. Michelson (talk | contribs) . . (1,840 bytes) (+460) . . (→ floated the whole thing on mercury with Morley, so it can be turned without being disturbed. the shift we expected was four tenths of a fringe and we have not got a twentieth of it)
• cur | prev 1881 A. Michelson (talk | contribs) . . (1,380 bytes) (+300) . . (→ built the two-arm form at Potsdam. it is far too sensitive for the building. every cart in the street shows up in the fringes and i have had to work at two in the morning)
• cur | prev 1866 J. Grimble (talk | contribs) . . (1,080 bytes) (+280) . . (→ the Concord's position, entered here in advance so that it cannot afterwards be said we trimmed. any instrument built to find the earth's motion through the aether will find nothing, because there is nothing to find. the earth does not move. objections to the usual address)
• cur | prev 1851 H. Fizeau (talk | contribs) . . (800 bytes) (+420) . . (→ put running water in one arm. the light is dragged, but only forty three per cent of the way, which is neither of the two answers the aether allows. recording the number and declining to explain it)
• cur | prev 1801 T. Young (talk | contribs) . . (380 bytes) (+380) . . (created page; two slits and a pinhole of sunlight. where the two paths differ by a whole wave you get light and where they differ by half a wave you get dark, and the stripes are the difference, written down)

Older revisions exist but have not been located. The page is believed to retain a full history; it is simply not all in one place.