Foucault pendulum

Rarity: Ultra rare

A topic known all over the world: only a few thousand cards.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

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.

Excerpt from the Wikipedia article “Foucault pendulum”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Arnaud 25, Public domain, via Wikimedia Commons.