Academy Quote by Leon Foucault
![“The observations, so numerous and so important, of the pendulum as object are especially relevant to the length of its oscillations. Those that I propose to make known to the [Paris] Academy [of Sciences] are principally addressed to the direction of the plane of its oscillation, which, moving…” quote by Leon Foucault](https://sms4smile.com/quotes/img-quotes/e85/leon-foucault-85526_academy_the-observations-so-numerous-and-so-impo_870149.jpg)
“The observations, so numerous and so important, of the pendulum as object are especially relevant to the length of its oscillations. Those that I propose to make known to the [Paris] Academy [of Sciences] are principally addressed to the direction of the plane of its oscillation, which, moving gradually from east to west, provides evidence to the senses of the diurnal movement of the terrestrial globe.”
About This Quote
Source Letter to the Paris Academy of Sciences, 1851
Pendulum swing direction reveals Earth’s rotation, linking daily motion to planetary movement.
In simple terms: Pendulum shows Earth spins daily.
Key Takeaway
Observe pendulum for Earth’s rotation.
Themes
science
physics
observation
Mood
curious
analytical
Type
scientific
educational
When to use this quote
- physics experiments
- educational demonstrations
- astronomical studies
Key Concepts
rotation
oscillation
geophysics
Questions to Reflect On
- What other simple experiments demonstrate planetary motion?
- How can this observation be applied today?
A Different Perspective
Pendulum data can be affected by local factors.
![“[W]hen we look at the graphs of rising ocean temperatures, rising carbon dioxide in the atmosphere and so on, we know that they are climbing far more steeply than can be accounted for by the natural oscillation of the weather ... What people (must) do is to change their behavior and their…” quote by David Attenborough](https://sms4smile.com/quotes/img-quotes/04d/david-attenborough-2396_atmosphere_w-hen-we-look-at-the-graphs-of-rising-oc_1110905.jpg)
