2020年8月29日 · The Foucault pendulum in the Pantheon has a 67 meter cable. At the latitude of Paris the distance to the Earth's axis is such that the required centripetal force to sustain circumnavigation of the Earth's axis corresponds to a weight on a 67 meter cable to be displaced about 10 centimeter.

2018年7月7日 · The Foucault pendulum is so evocative because the appearance of it is so simple. One or two years after the construction of the Foucault pendulum Foucault devised another way of seeing the Earth's rotation, while looking inside. Foucault commissioned his instrument maker to construct a device that Foucault called "gyroscope".

2021年9月11日 · Just before the pendulum reaches its maximum height, the electromagnet is given a short-lived electrical pulse which creates a magnetic field producing a force on the collar, cable and bob. Because the pulse is extremely short-lived, and the force (in the direction of the cable) generated is of relatively small magnitude, the overall motion of ...

Suppose I set up a Foucault pendulum and observe that it precesses at a rate of 216.528 degrees per day. While I am observing this, a total solar eclipse occurs. While I am observing this, a total solar eclipse occurs.

Why doesn't Foucault's pendulum show Earth's spin at the equator but works at the North/South poles? Because the Coriolis effect is purely vertical at the equator. The Coriolis acceleration is $-2\vec \Omega \times \vec v$, where $\vec \Omega$ is the Earth's angular velocity vector and $\vec v$ is the velocity of some object relative to the ...

2023年1月7日 · The first Foucault pendulum setup was in Foucault's basement workshop. The second one had a 21 meter wire, in the 'Musée des Arts et Metieres', the third one had a 67 meter wire, in the Pantheon in Paris. The longer the wire, the less sensitive the Foucault pendulum setup is to imperfections in the wire.

2014年1月3日 · If we start from the assumption that all frames of reference are valid for describing motion, how can a foucault pendulum either prove or disprove that the earth rotates or is stationary? Couldn't it just as easily prove that the earth is stationary and that the whole universe (including the earth's atmosphere) rotates?

2024年4月23日 · The book by William Tobin that you mention is in my opinion the best source for Foucault's thoughts about the veering of the pendulum. Foucault had extraordinary capability in experimental physics. My understanding was that in his time he was the leading man in the manufacturing of mirrors for telescopes. As to the pendulum:

$\begingroup$ I like to make a simulation of a foucault pendulum so I need to know what is $\dot{x}$ and $\dot{y}$ are. so yeah that would be my question @joshphysics $\endgroup$ – user61835 Commented Mar 2, 2013 at 17:45

2020年9月3日 · A Foucault pendulum swings back and forth in a plane and the Earth rotates beneath it, so that a relative motion exists between this plane and the earth's surface, so that the plane of the pendulum as viewed from above appears to rotate. This is the basic way the Foucault pendulum works.