foucault pendulum: meaning, definition, pronunciation and examples
LowTechnical/Scientific
Quick answer
What does “foucault pendulum” mean?
A pendulum that demonstrates the Earth's rotation by the gradual precession of its plane of swing relative to the Earth's surface.
Audio
Pronunciation
Definition
Meaning and Definition
A pendulum that demonstrates the Earth's rotation by the gradual precession of its plane of swing relative to the Earth's surface.
Any device or scientific apparatus based on Léon Foucault's 1851 design, often used as a monumental public exhibit in museums or scientific institutions to visualize a complex physical principle.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Pronunciation of 'Foucault' may vary slightly, with British English more likely to approximate the French /fu'koʊ/.
Connotations
Identical connotations of scientific demonstration, historical physics, and educational display.
Frequency
Equally low frequency in both dialects, confined to scientific, educational, and museum contexts.
Grammar
How to Use “foucault pendulum” in a Sentence
The Foucault pendulum [demonstrates/proves] [a physical principle].A Foucault pendulum was [instated/unveiled] in the [museum/atrium].Vocabulary
Collocations
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in physics, history of science, and engineering contexts to describe the apparatus or the principle it demonstrates.
Everyday
Rare, only when discussing specific museum exhibits or scientific demonstrations.
Technical
The precise term for the specific experimental setup designed by Léon Foucault.
Vocabulary
Synonyms of “foucault pendulum”
Neutral
Weak
Watch out
Common Mistakes When Using “foucault pendulum”
- Misspelling 'Foucault' as 'Focault' or 'Foucalt'.
- Using lowercase 'f' for 'Foucault'.
- Referring to any large decorative pendulum as a Foucault pendulum.
FAQ
Frequently Asked Questions
The French physicist Léon Foucault, who first publicly demonstrated it in 1851.
It is a pendulum free to swing in any vertical plane. Because the Earth rotates underneath it, the plane of the pendulum's swing appears to rotate (precess) slowly relative to the floor. The rate of precession depends on the latitude.
They are often featured as permanent exhibits in major science museums, planetariums, and some university physics buildings around the world.
No. The standard English pronunciation is /fuːˈkoʊ/ (foo-KOH), approximating the French. It is not pronounced like the English word 'fault'.
A pendulum that demonstrates the Earth's rotation by the gradual precession of its plane of swing relative to the Earth's surface.
Foucault pendulum is usually technical/scientific in register.
Learning
Memory Aids
Mnemonic
Think: 'Foucault found how the world goes round, with a pendulum swinging above the ground.'
Conceptual Metaphor
A VISIBLE PROOF OF THE INVISIBLE (making the imperceptible rotation of the Earth perceptible).
Practice
Quiz
What does a Foucault pendulum primarily demonstrate?