FAQ/Pendulum: Difference between revisions
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== Foucault's Pendulum ==
[[File:Foucault pendulum image.png|200px|right]]
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=== The Foucault's Pendulum need to be plugged in 🤔===
[[File:Foucaults Pendulum 1000747.png|80px|right]]
3B SCIENTIFIC® PHYSICS 3B SCIENTIFIC® PHYSICS has a "Pro" Foucault's Pendulum for sale. It listed for $8,527.00 to $13,921.99.
The description of device says
<blockquote>
Pendulum is for qualitative and quantitative demonstration of the rotation of the Earth by means of observing the plane of oscillation. '''To prevent the oscillation taking an elliptical path''', the thread upon which the pendulum bob is suspended passes through a Charron ring. The plane of the oscillation is detected with high accuracy by projecting the shadow of the thread onto a protractor scale. The rotation of the plane can thus be identified in a very short period of time. For longer periods of observation, the gradual damping of the oscillation can be compensated for by means of an '''electro-magnetic boost that can be adjusted to an arbitrary value'''.
</blockquote>
In the user manual it says The 3B Foucault pendulum is a compact
apparatus which maintains the amplitude of the pendulum by '''constant excitation'''. An '''electromagnet''' with a radially symmetric magnetic field is mounted exactly in the middle of the pendulum's path. The magnet only has an effect when the pendulum is moving towards the center. The electromagnet is controlled by a photovoltaic cell which registers the shadow of the pendulum motion by the light provided by a built-in fluorescent lamp. '''The pendulum is excited in a way such that its amplitude remains constant.''' <ref name=3bscientific></ref>
=== A Foucault's Pendulum at the south pole proves globe erf? ===
Just in time for the holidays, Jeran at [[People/Content_Creators/Jeranism|Jeranism]] found an article about a Foucault's Pendulum at the south "pole". After some heavy modification, the "scientists" were sure they have solid globe proof. There's no way they would lie; You might, but NOT them! <ref name=christmaspole></ref>
===See also===
* [[FAQ/Coriolis|Coriolis Effect]]
* [https://www.youtube.com/watch?v=LtMsAYKdPSY YouTube: Does the Foucault pendulum destroy the biblical earth model?]
* [[Misc/Videos/Foucault's Pendulum]]
===References===
<references>
<ref name="3bscientific">[https://www.3bscientific.com/product-manual/1000747_EN.pdf 3B SCIENTIFIC® PHYSICS User manual]</ref>
<ref name="christmaspole">[https://www.youtube.com/watch?v=YnbZPgUynrA&list=LL&index=1 YouTube: Christmas Fables - Pendulums at the South Pole with @jeranism]</ref>
</references>
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