Foucault pendulum
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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
Foucault's pendulum in the Panthéon, Paris
A print of the Foucault Pendulum, 1895
Panthéon
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The Panthéon is a monument in the 5th arrondissement of Paris, France. It stands in the Latin Quarter, on the Montagne Sainte-Geneviève, in the centre of the Place du Panthéon, which was named after i
Foucault pendulum
…made his most famous pendulum when he suspended a 28-kilogram (62 lb) brass-coated lead bob with a 67-metre-long (220 ft) wire from the dome of the Panthéon, Paris. Because the latitude of its location was ϕ = 48 ∘ 52 ′ N , the plane of the pendulum's swing made a full circle in approximately 23 h 56 ′ sin ϕ…
Pantheon of Paris 007
Looking upward at the first and second domes
Iron rods were used to give greater strength and stability to the stone structure (1758–90)
The Tomb of Jean-Jacques Rousseau