TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...

Spectators gathered in Paris in March 1851 were astonished to witness evidence of the Earth’s rotation. With a simple apparatus comprising a heavy ball swinging on a wire, Léon Foucault showed how the ...

The Earth rotates, and where you are changes how you see the universe. We are introduced to Foucault’s pendulum. Moving under the influence of gravity, over the course of a day the pendulum’s ...

Learning is generally most effective when there is a healthy mix of theory as well as hands on learning through experiments or demonstrations. In most cases because of limited equipment available or ...