GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Foucault Pendulum was devised to demonstrate Earth's rotation. It is essentially a tall pendulum, free to oscillate in any vertical plane. The plane in which the pendulum swings rotates with time because of Earth's daily rotation. Griffith Observatory in Los Angeles is a well known institution devoted to public astronomy and science outreach. After several years of being closed for extensive renovations the observatory reopened to public in November 2006.
Model release not required. Property release not required.