Title: Foucault pendulum Earth rotation Smithsonian at DuckDuckGo

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## [How Does Foucault's Pendulum Prove the Earth Rotates?](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.smithsonianmag.com%2Fsmithsonian%2Dinstitution%2Fhow%2Ddoes%2Dfoucaults%2Dpendulum%2Dprove%2Dearth%2Drotates%2D180968024%2F&rut=bed8435565c51afc17ca25780402f8bd55f055a58d2a6ad852d28a771484f69c)

[![Image 1](https://external-content.duckduckgo.com/ip3/www.smithsonianmag.com.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.smithsonianmag.com%2Fsmithsonian%2Dinstitution%2Fhow%2Ddoes%2Dfoucaults%2Dpendulum%2Dprove%2Dearth%2Drotates%2D180968024%2F&rut=bed8435565c51afc17ca25780402f8bd55f055a58d2a6ad852d28a771484f69c)[www.smithsonianmag.com/smithsonian-institution/how-does-foucaults-pendulum-prove-earth-rotates-180968024/](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.smithsonianmag.com%2Fsmithsonian%2Dinstitution%2Fhow%2Ddoes%2Dfoucaults%2Dpendulum%2Dprove%2Dearth%2Drotates%2D180968024%2F&rut=bed8435565c51afc17ca25780402f8bd55f055a58d2a6ad852d28a771484f69c)

[A **Foucault**-inspired **pendulum** apparatus at the CosmoCaixa museum in Barcelona, Spain. As the path of the **pendulum** shifts due to **Earth's****rotation**, the bob will gradually knock over all of the ...](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.smithsonianmag.com%2Fsmithsonian%2Dinstitution%2Fhow%2Ddoes%2Dfoucaults%2Dpendulum%2Dprove%2Dearth%2Drotates%2D180968024%2F&rut=bed8435565c51afc17ca25780402f8bd55f055a58d2a6ad852d28a771484f69c)

## [Foucault Pendulum - Smithsonian Institution](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.si.edu%2Fspotlight%2Ffoucault%2Dpendulum&rut=fc9334d6d7f6d2038d748d987c366a577bba7232d6b15b88525d1d9d2eeb232b)

[![Image 2](https://external-content.duckduckgo.com/ip3/www.si.edu.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.si.edu%2Fspotlight%2Ffoucault%2Dpendulum&rut=fc9334d6d7f6d2038d748d987c366a577bba7232d6b15b88525d1d9d2eeb232b)[www.si.edu/spotlight/foucault-pendulum](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.si.edu%2Fspotlight%2Ffoucault%2Dpendulum&rut=fc9334d6d7f6d2038d748d987c366a577bba7232d6b15b88525d1d9d2eeb232b)

[The **Foucault****pendulum** which was displayed for many years in the **Smithsonian's** National Museum of American History was removed in late 1998 to make room for the Star-Spangled Banner Preservation Project and there are no current plans to reinstall it. The **Foucault****Pendulum** is named for the French physicist Jean **Foucault** (pronounced "Foo-koh), who first used it in 1851 to demonstrate the **rotation** ...](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.si.edu%2Fspotlight%2Ffoucault%2Dpendulum&rut=fc9334d6d7f6d2038d748d987c366a577bba7232d6b15b88525d1d9d2eeb232b)

## [Foucault pendulum - Wikipedia](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFoucault_pendulum&rut=fcbd59785b484972645a27b8f11cd9faeba349566dad52ca33e760f05c77854d)

[![Image 3](https://external-content.duckduckgo.com/ip3/en.wikipedia.org.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFoucault_pendulum&rut=fcbd59785b484972645a27b8f11cd9faeba349566dad52ca33e760f05c77854d)[en.wikipedia.org/wiki/Foucault_pendulum](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFoucault_pendulum&rut=fcbd59785b484972645a27b8f11cd9faeba349566dad52ca33e760f05c77854d)

[**Foucault's****pendulum** in the Panthéon, Paris The **Foucault****pendulum** or **Foucault's****pendulum** is a simple device named after French physicist Léon **Foucault**, conceived as an experiment to demonstrate the **Earth's****rotation**. If a long and heavy **pendulum** suspended from the high roof above a circular area is monitored over an extended period of time, its plane of oscillation appears to change ...](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFoucault_pendulum&rut=fcbd59785b484972645a27b8f11cd9faeba349566dad52ca33e760f05c77854d)

## [The Foucault Pendulum - Making a Modern Museum | Albert H. Small ...](https://duckduckgo.com/l/?uddg=https%3A%2F%2Famericanhistory.si.edu%2Fdocumentsgallery%2Fexhibitions%2F50th%2F8.html&rut=40d8c16628a3711448d61fdbbe77330096cb6e46ee8adaa5ad13ba4e9a20d09b)

[![Image 4](https://external-content.duckduckgo.com/ip3/americanhistory.si.edu.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Famericanhistory.si.edu%2Fdocumentsgallery%2Fexhibitions%2F50th%2F8.html&rut=40d8c16628a3711448d61fdbbe77330096cb6e46ee8adaa5ad13ba4e9a20d09b)[americanhistory.si.edu/documentsgallery/exhibitions/50th/8.html](https://duckduckgo.com/l/?uddg=https%3A%2F%2Famericanhistory.si.edu%2Fdocumentsgallery%2Fexhibitions%2F50th%2F8.html&rut=40d8c16628a3711448d61fdbbe77330096cb6e46ee8adaa5ad13ba4e9a20d09b)

[Brochure explaining how the **Foucault****Pendulum** shows the **rotation** of the **Earth**. Tens of thousands of these brochures were given to visiting school groups. The **pendulum** in motion.](https://duckduckgo.com/l/?uddg=https%3A%2F%2Famericanhistory.si.edu%2Fdocumentsgallery%2Fexhibitions%2F50th%2F8.html&rut=40d8c16628a3711448d61fdbbe77330096cb6e46ee8adaa5ad13ba4e9a20d09b)

## [Foucault Pendulum - Smithsonian Institution](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.si.edu%2Fexhibitions%2Ffoucault%2Dpendulum%2Devent%2Dexhib%2D4237&rut=b07b84c41388945984623d3ba7927db231c55043392b7c8905c640126314c9a6)

[![Image 5](https://external-content.duckduckgo.com/ip3/www.si.edu.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.si.edu%2Fexhibitions%2Ffoucault%2Dpendulum%2Devent%2Dexhib%2D4237&rut=b07b84c41388945984623d3ba7927db231c55043392b7c8905c640126314c9a6)[www.si.edu/exhibitions/foucault-pendulum-event-exhib-4237](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.si.edu%2Fexhibitions%2Ffoucault%2Dpendulum%2Devent%2Dexhib%2D4237&rut=b07b84c41388945984623d3ba7927db231c55043392b7c8905c640126314c9a6)

[Modeled after French physicist J. B. L. **Foucault's** 1851 **pendulum**, the museum's **pendulum** demonstrates the axial **rotation** of the **earth**. The 240-pound brass, hollow bob is suspended by a 54-ft. steel cable from the ceiling of the 4th floor. Although the **pendulum's** vertical plane seems to change, in fact it remains fixed. What is actually moving is the floor, which rotates under the **pendulum** ...](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.si.edu%2Fexhibitions%2Ffoucault%2Dpendulum%2Devent%2Dexhib%2D4237&rut=b07b84c41388945984623d3ba7927db231c55043392b7c8905c640126314c9a6)

## [The Popular and Scientific Reception of the Foucault Pendulum in the ...](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_sic_3652&rut=d12c128f167abac1c193df4f9df9dabab9ffb45d5e7ba963c46e7e9a3b0236ad)

[![Image 6](https://external-content.duckduckgo.com/ip3/siarchives.si.edu.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_sic_3652&rut=d12c128f167abac1c193df4f9df9dabab9ffb45d5e7ba963c46e7e9a3b0236ad)[siarchives.si.edu/collections/siris_sic_3652](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_sic_3652&rut=d12c128f167abac1c193df4f9df9dabab9ffb45d5e7ba963c46e7e9a3b0236ad)

[Summary In the months following Jean Bernard Leon **Foucault's** early 1851 demonstration in Paris of the **earth's** diurnal **rotation** with a vibrating **pendulum**, members of the entire scientific community, as well as the general public, participated in "**pendulum** mania" demonstrations held throughout Europe and the United States to imitate **Foucault**.](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_sic_3652&rut=d12c128f167abac1c193df4f9df9dabab9ffb45d5e7ba963c46e7e9a3b0236ad)

## [Foucault Pendulum | Earth Rotation Proof](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fvideophysics.com%2Ffoucault%2Dpendulum&rut=0aa6141de9c199872014f235338a6df36bf73ce2560f7808386dec6936d14dc8)

[![Image 7](https://external-content.duckduckgo.com/ip3/videophysics.com.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fvideophysics.com%2Ffoucault%2Dpendulum&rut=0aa6141de9c199872014f235338a6df36bf73ce2560f7808386dec6936d14dc8)[videophysics.com/foucault-pendulum](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fvideophysics.com%2Ffoucault%2Dpendulum&rut=0aa6141de9c199872014f235338a6df36bf73ce2560f7808386dec6936d14dc8)

[Today, **Foucault****pendulums** grace science museums worldwide, from the **Smithsonian** to the Griffith Observatory. The concept extends to ring laser gyroscopes and fiber optic gyroscopes, which detect **rotation** via the Sagnac effect—used in aircraft navigation, spacecraft attitude control, and even detecting seismic waves.](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fvideophysics.com%2Ffoucault%2Dpendulum&rut=0aa6141de9c199872014f235338a6df36bf73ce2560f7808386dec6936d14dc8)

## [Foucault Pendulum at National Museum of History and Technology](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_arc_398143&rut=b0ab4c8f801955462ef3afd492eeec6965ce0dd3878e1903b42bd32e543ea53b)

[![Image 8](https://external-content.duckduckgo.com/ip3/siarchives.si.edu.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_arc_398143&rut=b0ab4c8f801955462ef3afd492eeec6965ce0dd3878e1903b42bd32e543ea53b)[siarchives.si.edu/collections/siris_arc_398143](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_arc_398143&rut=b0ab4c8f801955462ef3afd492eeec6965ce0dd3878e1903b42bd32e543ea53b)

[Modeled after French physicist J. B. L. **Foucault's** 1851 **pendulum**, the museum's **pendulum** demonstrates the axial **rotation** of the **earth**. The 240-pound brass, hollow bob is suspended by a 54-ft. steel cable from the ceiling of the 4th floor.](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fsiarchives.si.edu%2Fcollections%2Fsiris_arc_398143&rut=b0ab4c8f801955462ef3afd492eeec6965ce0dd3878e1903b42bd32e543ea53b)

## [Foucault Pendulum - Smithsonian American Women's History Museum](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwomenshistory.si.edu%2Fspotlight%2Ffoucault%2Dpendulum&rut=a47e08c3f4039b9d63c7a9ea45518153f2f118cebb4d60235465fb8f119f8445)

[![Image 9](https://external-content.duckduckgo.com/ip3/womenshistory.si.edu.ico)](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwomenshistory.si.edu%2Fspotlight%2Ffoucault%2Dpendulum&rut=a47e08c3f4039b9d63c7a9ea45518153f2f118cebb4d60235465fb8f119f8445)[womenshistory.si.edu/spotlight/foucault-pendulum](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwomenshistory.si.edu%2Fspotlight%2Ffoucault%2Dpendulum&rut=a47e08c3f4039b9d63c7a9ea45518153f2f118cebb4d60235465fb8f119f8445)

[The **Foucault****Pendulum** is named for the French physicist Jean **Foucault** (pronounced "Foo-koh), who first used it in 1851 to demonstrate the **rotation** of the **earth**.](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwomenshistory.si.edu%2Fspotlight%2Ffoucault%2Dpendulum&rut=a47e08c3f4039b9d63c7a9ea45518153f2f118cebb4d60235465fb8f119f8445)

## [Foucault and the rotation of the Earth - ScienceDirect](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS1631070517301019&rut=c15b461be720d2ef756c23b200906bfcbb34ce70461a64b71cbd98b1c1302412)

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[In February 1851, Léon **Foucault** published in the Comptes rendus his famous **pendulum** experiment performed at the "Observatoire de Paris". This ended two centuries of quest for an experimental demonstration of **Earth****rotation**. One month later, the experiment was reproduced at larger scale in the Panthéon and, as early as the summer of 1851, it was being repeated in many places across the ...](https://duckduckgo.com/l/?uddg=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS1631070517301019&rut=c15b461be720d2ef756c23b200906bfcbb34ce70461a64b71cbd98b1c1302412)

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