#foucaultpendulum — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #foucaultpendulum, aggregated by home.social.
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A Pendulum for the Multiverse: David Albert, Hugh Everett, and the Worlds We Never Feel
On my grandfather's porch in North Loup, Nebraska, the ground kept its promises. Summer evenings the floorboards held the day's heat, the corn stood in rows that ran clear to the horizon, and nothing in all that flat immensity so much as trembled. When a teacher first told me the Earth was spinning at close to a thousand miles an hour while racing around the Sun at sixty-seven thousand more, I pressed my bare feet against those boards and waited to feel the ride. The stillness came back like a verdict. Whatever the books claimed, my soles reported a stationary world, and a boy trusts his soles. Every child who has run that experiment has rebuilt, in miniature, the strongest objection the seventeenth century could throw at Copernicus. If the Earth turns, why does a dropped stone land at the foot of the tower and never a few feet to the west? Why does the gale of our orbital speed fail to strip the leaves from the trees? The objection deserved respect because it rested on evidence, on the honest testimony of every human body that had ever stood still. It took Galileo's ship, and then Newton's laws, to explain why that testimony, though honest, was worthless. […] -
Measure the Earth’s Rotation Victorian Style
https://web.brid.gy/r/https://hackaday.com/2026/05/13/measure-the-earths-rotation-victorian-style/
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`The Lense-Thirring effect, a prediction of general relativity, implies that massive rotating objects like Earth can slightly "drag" spacetime, which could affect the pendulum's oscillation. This effect, though theoretically significant, is currently too small to measure with a Foucault pendulum.`
https://en.wikipedia.org/wiki/Foucault_pendulum#Absolute_reference_frame_for_pendulum
#physics #Foucault #pendulum #FoucaultPendulum #Earth #rotation #relativity #generalRelativity #Einstein
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A #Foucault #pendulum in Fortress Explorations at #Tokyo #Disneysea
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I passed by twice. At 14:44 the pendulum was between U and S. At 15:19 above the M. In Paris you expect a full circle in 31h50mn. #FoucaultPendulum #PenduleDeFoucault
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Galileo had a 10m long pendulum outside the window of his office at Padova University. He observed that the period of the oscillations were almost independent of their amplitude and proposed to use it as a speed regulator. (1641)
The Foucault pendulum installed in Palazzo della Ragione allows to observe the rotation of Earth but the rotation of it's oscillation plane is slower than the Earth's (265⁰ per day).